Washington, Feb. 17: An extraordinary exchange unfolded in the White House yesterday when President Donald Trump’s command of facts was openly challenged by a reporter who asked: “Why should Americans trust you?” The issue was the margin of victory in the US electoral college, which Trump asserted early in a rowdy and free-for-all news conference was the “biggest” since fellow Republican Ronald Reagan, who was elected in 1980 and 1984. Trump defeated Hillary Clinton by a 304-227 tally of state-by-state electors, who represent votes cast in the election.