PRESIDENTIAL RACE

WASHINGTON — Donald Trump scores victories in three states, including the big-prize Florida, but loses Ohio to the state's governor, John Kasich, as the billionaire continues to move ahead in his stunning campaign for the Republican presidential nomination. Hillary Clinton wins at least four states, dealing a severe blow to Bernie Sanders' bid to slow her march toward the Democratic nomination. AP Photos. AP Video.

With: 2016=ELECTION RDP-THE LATEST; OBAMA-POLITICS; 2016-ELECTION-WATCHING TUESDAY.

UNITED STATES-CUBA

WASHINGTON — President Barack Obama sent an unmistakable message to Americans ahead of his historic trip to Havana: Cuba is open for business. Punching fresh holes in the generations-old U.S. embargo, Obama's administration removed the last meaningful restrictions on travel, putting a Cuba vacation within reach for millions of Americans over the coming years. The sweeping changes also clear a path for Cuban athletes to one day play Major League Baseball and other professional sports.

CONGRESS-FLINT WATER

WASHINGTON — Former city and federal officials point fingers at one another for failing to protect the 100,000 citizens of Flint, Michigan, from lead-laced water at a congressional hearing as Republicans targeted for blame an Environmental Protection Agency executive who resigned as the crisis worsened. 

CONGRESS-BUDGET

WASHINGTON — Tea party conservatives have blocked a budget plan backed by Republican leaders, a blow to the leader of the U.S. House, Speaker Paul Ryan, and a reflection of the anti-Washington mood pushed by the party's front-running presidential candidate, Donald Trump. 

MEXICO-SOCIAL MEDIA DEBATE

MEXICO CITY — Mexicans are increasingly taking to social media to post videos of bad civic behavior, led by two "heroes" who wield comedy and confrontation to expose lazy cops, litterers, threatening bodyguards and arrogant drivers. 

OBAMA-OFFSHORE DRILLING

WASHINGTON — In a major reversal, the Obama administration says it will bar oil drilling in the Atlantic Ocean, a move cheered by environmentalists and consistent with the president's aggressive steps to combat climate change.