(Andrew Harnik | AP file photo) In this March 31, 2017, photo, a portrait of former President Andrew Jackson hangs on the wall behind President Donald Trump, accompanied by Vice President Mike Pence, in the Oval Office at the White House in Washington. President Donald Trump made puzzling claims about Andrew Jackson and the Civil War in an interview, suggesting that he was uncertain about the origin of the conflict while claiming that Jackson was upset about the war that started more than a decade after his death.