Costa Rican former President Oscar Arias says US revoked his visa

Former Costa Rican President and Nobel Prize winner Oscar Arias said on Tuesday that the U.S. had revoked his visa to enter the country, weeks after he criticized U.S. President Donald Trump on social media saying he was behaving like "a Roman emperor." Arias, 84, was president between 1986 and 1990 and again between 2006 and 2010. A self-declared pacifist, he won the 1987 Nobel Peace Prize for his role in brokering peace during the Central American conflicts of the 1980s. Arias also promoted a free-trade agreement with the U.S. during his last term and in 2007 established diplomatic ties…