![Darko Vojinovic A vandalized pre-election billboard shows Serbian President Aleksandar Vucic, center, with associates after a local election in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/597c8c0539614032a7a7c506275350c3/preview/preview.jpg?s=680x&wm=false)
A vandalized pre-election billboard shows Serbian President Aleksandar Vucic, center, with associates after a local election in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)
![Darko Vojinovic Serbian President Aleksandar Vucic, left, toasts with Serbian Interior Minister Ivica Dacic after his headquarter claimed victory in a local election in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/7c04b6b3edff4e96ac312951443662c0/preview/preview.jpg?s=680x&wm=false)
Serbian President Aleksandar Vucic, left, toasts with Serbian Interior Minister Ivica Dacic after his headquarter claimed victory in a local election in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A voter casts her ballot for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/1e25d2df0b864d3baa01933ffb987e85/preview/preview.jpg?s=680x&wm=false)
A voter casts her ballot for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)
![Darko Vojinovic Voters prepare ballots for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/bbe06a55dd4f4661a29495d098194d6f/preview/preview.jpg?s=680x&wm=false)
Voters prepare ballots for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A voter casts his ballot for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/93e48f1b54c1429183f57d19b9a77125/preview/preview.jpg?s=680x&wm=false)
A voter casts his ballot for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A man walks in front of a pre-election billboard showing Serbian President Aleksandar Vucic, right, and Belgrade mayor candidate Aleksandar Sapic in Belgrade, Serbia, Wednesday, May 29, 2024, ahead of the municipal vote set for June 2. Voters in Serbia go to the polls this weekend in a municipal election for dozens of cities and towns, including a rerun vote in the capital Belgrade where ruling populists were accused of a fraud at a previous vote in December. The right-wing Serbian Progressive Party of President Aleksandar Vucic is seen as a favorite ahead of the Sunday balloting which could further secure the strongman's already vast hold on power. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/3004997f917a48b794629fe404b64e15/preview/preview.jpg?s=680x&wm=false)
A man walks in front of a pre-election billboard showing Serbian President Aleksandar Vucic, right, and Belgrade mayor candidate Aleksandar Sapic in Belgrade, Serbia, Wednesday, May 29, 2024, ahead of the municipal vote set for June 2. Voters in Serbia go to the polls this weekend in a municipal election for dozens of cities and towns, including a rerun vote in the capital Belgrade where ruling populists were accused of a fraud at a previous vote in December. The right-wing Serbian Progressive Party of President Aleksandar Vucic is seen as a favorite ahead of the Sunday balloting which could further secure the strongman's already vast hold on power. (AP Photo/Darko Vojinovic)
![Darko Vojinovic A vandalized pre-election billboard showing Serbian President Aleksandar Vucic, center, with associates, reading: "The future is in your hands" in Belgrade, Serbia, Thursday, May 30, 2024, ahead of the municipal vote set for June 2. Voters in Serbia go to the polls this weekend in a municipal election for dozens of cities and towns, including a rerun vote in the capital Belgrade where ruling populists were accused of a fraud at a previous vote in December. The right-wing Serbian Progressive Party of President Aleksandar Vucic is seen as a favorite ahead of the Sunday balloting which could further secure the strongman's already vast hold on power. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/471d1cb1fcd84a179441391f52cbe5d0/preview/preview.jpg?s=680x&wm=false)
A vandalized pre-election billboard showing Serbian President Aleksandar Vucic, center, with associates, reading: "The future is in your hands" in Belgrade, Serbia, Thursday, May 30, 2024, ahead of the municipal vote set for June 2. Voters in Serbia go to the polls this weekend in a municipal election for dozens of cities and towns, including a rerun vote in the capital Belgrade where ruling populists were accused of a fraud at a previous vote in December. The right-wing Serbian Progressive Party of President Aleksandar Vucic is seen as a favorite ahead of the Sunday balloting which could further secure the strongman's already vast hold on power. (AP Photo/Darko Vojinovic)
![Darko Vojinovic Serbian President Aleksandar Vucic speaks at his party's headquarters during local elections in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/8974eb5e387448a5aeaf05155c0ed772/preview/preview.jpg?s=680x&wm=false)
Serbian President Aleksandar Vucic speaks at his party's headquarters during local elections in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)
![Darko Vojinovic Serbian President Aleksandar Vucic speaks at his party's headquarters during local elections in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/206476c616994948a36bdef77ff23e00/preview/preview.jpg?s=680x&wm=false)
Serbian President Aleksandar Vucic speaks at his party's headquarters during local elections in Belgrade, Serbia, Sunday, June 2, 2024. Tensions soared during Serbia's municipal elections Sunday in key cities and towns as ruling populists sought to cement their already vast hold on power in the Balkan country that is a candidate nation for European Union membership. (AP Photo/Darko Vojinovic)
![Darko Vojinovic Voters prepare ballots for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)](https://mapi.associatedpress.com/v2/items/edcf462b0ece4c63a936bde541d85e4a/preview/preview.jpg?s=680x&wm=false)
Voters prepare ballots for the local election at a polling station in Belgrade, Serbia, Sunday, June 2, 2024. Voters in Serbia on Sunday are casting ballots in a rerun election in the capital, Belgrade, and in dozens of other cities and towns, with ruling right-wing populists seeking to cement their already vast hold on power. The vote in Belgrade is being repeated after reports of widespread irregularities last December triggered political tensions and accusations that President Aleksandar Vucic's Serbian Progressive Party rigged the vote. (AP Photo/Darko Vojinovic)