President Obama is expected to make a historic trip to Cuba in the next month, becoming the first sitting U.S. president to visit the country in more than 80 years, according to ABC News. The president is planning to visit March 21 before he flies to Argentina, according to sources with knowledge of the plan. A National Security Council official is planning to make the announcement Thursday at the White House briefing. The last and only sitting U.S. president to travel to Cuba was Calvin Coolidge in 1928, for the Sixth Annual International Conference of American States in Havana. President Jimmy Carter visited the island nation 20 years after he left office in 2002 and again in 2011.