The White House and congressional Republicans allied with Mr. Trump are preparing for a Senate trial in which they will not only declare Mr. Trump’s innocence but also present a version of events that portray him as the victim of a broad plot to undermine his presidency even before it began…

Mr. Trump has also seized on the allegations against him and turned them on someone else, a familiar tactic. He insisted it was really the Bidens who were linked to corruption in Ukraine and that bad actors there had done him harm by meddling in the 2016 election, a claim intelligence officials have roundly rejected.

In the “Fox and Friends” interview, Mr. Trump unleashed a torrent of falsehoods to support his claims, including saying that the Obama administration wiretapped his 2016 campaign and asserting that Mr. Schiff “made up” a phone call of his, when, in fact, the California congressman stated at the time that he was conveying “the essence” of Mr. Trump’s July 25 call with President Volodymyr Zelensky of Ukraine.