What would criminal charges against Donald Trump look like? Obstruction of an official proceeding is a serious offense that requires the prosecution to show that a defendant obstructed, or attempted to obstruct, an official proceeding and that the defendant did so corruptly. The official proceeding part of this is clear — by law, on Jan. 6, Congress and the vice president must certify the votes. There appears to have been an orchestrated plot by some to try to interfere with that certification — the question is really whether the former president was part of that plot. The committee has presented evidence suggesting that Mr. Trump, along with the lawyer John Eastman, and perhaps others such as the White House chief of staff, Mark Meadows, and Jeffrey Clark, a former Justice Department official, attempted to interfere with the election certification on Jan. 6. Before the hearings, it was thought that Mr. Trump’s defense against this charge is that he genuinely believed that he had won the election and wasn’t acting “corruptly.”

The testimony in last week’s hearing cast immense doubt on that claim. Mr. Trump’s close ally, former Attorney General William Barr, testified that he told the president that arguments claiming he had won the election were “bullshit.” Mr. Trump’s daughter Ivanka testified that she believed Mr. Barr. Mr. Trump’s own election data people told him the same. Mr. Trump might try to claim he still believed the nonsense, but such an argument would be difficult to make given the array of people who told him in no uncertain terms that he had lost. Mr. Trump persisted, despite the warnings, to try to interfere with the lawful transfer of power. This looks very much like an attempt to obstruct an official proceeding.