Republicans have sought for weeks amid the impeachment inquiry to shift attention to President Trump's demands that Ukraine investigate any 2016 election meddling, defending it as a legitimate concern while Democrats accuse Mr. Trump of pursuing fringe theories for his benefit.
The Republican defense of Mr. Trump became central to the impeachment proceedings when Fiona Hill, a respected Russia scholar and former senior White House official, added a harsh critique during testimony on Thursday. She told some of Mr. Trump's fiercest defenders in Congress that they were repeating "a fictional narrative" — and that it likely came from a disinformation campaign by Russian security services, which themselves propagated it.