Among 10 Things to Know: Trump blasts conservative lawmakers who blocked GOP bill to overhaul 'Obamacare'; what's latest concern for Russia's Putin; NCAA's Final Four set.
Your daily look at late-breaking news, upcoming events and the stories that will be talked about Monday:
The president attacks conservative lawmakers for the failure of the Republican bill to replace Obama's health care law.
2. RELIEF QUICKLY FOLLOWED BY ANXIETY
Americans who benefit from "Obamacare" - and were relieved when a GOP push to repeal it failed - are facing new concerns with Trump vowing to let the law "explode."
3. WHAT'S LATEST CONCERN FOR PUTIN
Russia's opposition puts on a nationwide show of strength with dozens of protests across the vast country.
Police still have no one in custody after the shootout that left one person dead and 15 others wounded.
U.S.-backed Syrian Kurdish forces say they captured a strategically important air base from the extremists in north Syria.
Angela Merkel's conservative party easily wins an election in Germany's western Saarland state, an unexpectedly strong performance as Merkel prepares to seek a fourth term in a national vote later this year.
The head of the EPA says the president in the coming days will sign an executive order that unravels his predecessor's sweeping plan to curb global warming.
8. IRAN SLAPS US BUSINESSES
Tehran sanctions what it describes as 15 American companies that support Israel's occupation of land Palestinians want for a future state.
9. ACROSS ITALY, TOASTS TO TOSCANINI
Celebrations are planned across his homeland to mark the 150th anniversary of the birth of Arturo Toscanini, one of the 20th century's most enduring conductors.
10. JUST TWO COUPLES LEFT AT BIG DANCE
The Final Four is set. And in an unusual bit of geography, it'll be schools from neighboring states out west (Oregon, Gonzaga) against schools from neighboring states in the east (North Carolina, South Carolina).