In an extraordinary escalation of the impeachment battle, House Democrats on Friday subpoenaed the White House for a sweeping array of documents on President Trump’s dealings with Ukraine and demanded numerous additional records from Vice President Mike Pence.

The subpoena was the Democrats’ most aggressive step yet in the 10-day-old impeachment inquiry, and it came as Trump angrily insisted — at least 27 times in a 23-minute news conference — that he was only seeking to root out corruption when he pressed Ukraine to investigate his Democratic political opponents.