![Alex Brandon FILE - Sen. Jon Tester, D-Mont., walks to a vote on Capitol Hill, Wednesday, Sept. 6, 2023, in Washington. Tester faced off with Republican challenger Tim Sheehy during their first debate on Sunday, June 9, 2024. (AP Photo/Alex Brandon, File)](https://mapi.associatedpress.com/v2/items/31df0127beee404295b5aec90572f272/preview/preview.jpg?s=680x)
FILE - Sen. Jon Tester, D-Mont., walks to a vote on Capitol Hill, Wednesday, Sept. 6, 2023, in Washington. Tester faced off with Republican challenger Tim Sheehy during their first debate on Sunday, June 9, 2024. (AP Photo/Alex Brandon, File)
![Matthew Brown FILE - Senate candidate Tim Sheehy talks about his campaign, Feb. 9, 2024, in Helena, Mont. Sheehy faced off with Democratic Sen. Jon Tester on Sunday, June 9, 2024, during their first debate ahead of the November election. (AP Photo/Matthew Brown, File)](https://mapi.associatedpress.com/v2/items/2147a50e716f4f999526266b4c454cbb/preview/preview.jpg?s=680x)
FILE - Senate candidate Tim Sheehy talks about his campaign, Feb. 9, 2024, in Helena, Mont. Sheehy faced off with Democratic Sen. Jon Tester on Sunday, June 9, 2024, during their first debate ahead of the November election. (AP Photo/Matthew Brown, File)