President Barack Obama stands with House Speaker Paul Ryan of Wis., in Emancipation Hall on Capitol Hill in Washington, Wednesday, Dec. 9, 2015, during an event to celebrate the 150th anniversary of the 13th amendment that abolished slavery. (AP Photo/Evan Vucci)

Obama takes veiled swipe at Trump at Capitol Hill ceremony

The president said Americans will betray their past if “we were to deny the possibility of movement, the possibility of progress, if we were…