A president challenged at home and abroad

After cutting short a trip to London, where other world leaders appeared to mock him, President Trump is back in Washington, where he faces the likelihood of impeachment by Christmas. Read more from our chief White House correspondent.

At a House Judiciary Committee hearing on Wednesday, three constitutional scholars who were invited by Democrats said that Mr. Trump’s dealings with Ukraine clearly met the definition of an impeachable abuse of power.

A Republican-selected scholar, Jonathan Turley, said that he hadn’t voted for Mr. Trump and didn’t condone his behavior, but cautioned Democrats against rushing to an impeachment based on an incomplete set of facts.

The details: Read key passages from the scholars’ arguments and watch highlights of the hearing.

Related: Mr. Trump called Prime Minister Justin Trudeau of Canada “two-faced” and scrapped plans for a formal news conference at the NATO meeting in London after Mr. Trudeau was filmed apparently gossiping about him with other leaders. (Watch the video here.)