CLEVELAND — Donald Trump and Hillary Clinton triumphed Tuesday in Florida's presidential primaries, capturing the biggest prize on a crucial day of voting and showcasing the strength of the two front-runners. Trump's victory was a devastating blow to Marco Rubio, ending the Florida senator's once-promising White House campaign. Rubio implicitly rebuked Trump throughout a speech announcing he was dropping out of the race, imploring Americans to "not give in to the fear, do not give in to the frustration."