WASHINGTON (AP) — A former top White House official confirmed Thursday that military aid to Ukraine was held up by President Donald Trump's demand for the ally to investigate Democrats and Joe Biden, but he testified he saw nothing illegal about the quid pro quo at the center of the Democrat-led impeachment inquiry.

Tim Morrison, who stepped down from the National Security Council the day before testifying, was the first White House political appointee to appear and spent more than eight hours behind closed doors with House investigators.

"I want to be clear, I was not concerned that anything...