MICHAEL GOODWIN: Pelosi’s impeachment flip-flop changes everything.

In surrendering to the radicals and the noisy drumbeat of their media handmaidens, Pelosi established a formal investigative process involving the top legislative committees.

Yet she did something else, too, something far more monumental: She effectively committed House Dems to impeaching President Trump.

Because of what she said and did, if the House doesn’t go all the way, it will be a political disaster. Either failing to take a vote on articles of impeachment, or failing to get enough votes among her majority to pass any articles, would be seen as a political exoneration for Trump, likely leading to his re-election.

Don’t get cocky.

That aside, maybe the only thing to the Democrats’ kamikaze wing worse than not going ahead with an impeachment inquiry would be an unsuccessful one.