Since being elected president, Donald Trump has vociferously claimed he engaged in “no collusion” with Vladimir Putin’s attack on the 2016 US election and that the investigation of any interactions between him and his associates and Russians was a “witch hunt” or a “rigged witch hunt.” Yet his historic Helsinki summit with Putin—and particularly the unsettling joint press conference they held—provided a clear indication that Trump is indeed guilty of one form of collusion: colluding with Putin to cover up Moscow’s criminal assault on American democracy. I’ve been making this case for over a year, noting that “Trump actively and enthusiastically aided and abetted” Putin’s plot against the United States by supporting Moscow’s denial that it mounted information warfare that undermined the election and helped Trump.