WASHINGTON (AP) — Former President Barack Obama painted a unsparing portrait of American democracy on the brink if President Donald Trump wins in November, warning in a scathing, and at times emotional, address Wednesday that his successor is both unfit for office and apathetic to the nation's founding principles.

"This administration has shown it will tear our democracy down if that's what it takes to win," Obama said in unflinching remarks on the third night of the Democratic convention. He spoke from Philadelphia, where the United States Constitution was drafted and signed.

Obama's address...