Former U.S. President Donald Trump said the U.S. will remain in NATO and come to the aid of a bloc member if they are attacked so long as other countries “play fair” and pay their share of maintaining the alliance. “NATO has to treat the U.S. fairly, because if it’s not for the United States, NATO literally doesn’t even exist,” Trump told British broadcaster GB News in an interview to air March 19. Trump – who could be reelected to the White House later this year – unsettled international allies last month when he said he would allow Russia to do “whatever the hell they want” to NATO member co…