With impeachment over, 9/11 probe leaders lend weight to calls for an independent commission to investigate Capitol attack

Saturday’s 57-to-43 vote brought an end to Congress’s formal effort to hold former president Donald Trump accountable for the Jan. 6 insurrection at the Capitol. But that traumatic moment for the country will not quickly fade, nor should it, not after an attack on the symbol of democracy and democracy itself.

The Senate vote left multiple questions still to be answered, including some that the president’s legal team deflected during the trial. Chief among them: Exactly what did Trump know as the attacks were unfolding, and why he didn’t he...