The WSJ‘s Gerald Seib, who knows a thing or two about DC, on yesterday’s stunning events (snips from the piece, with my emphasis):

Yet the contours of the story Mr. Cohen obliquely referred to—payoffs to two young women who alleged extramarital affairs with Mr. Trump—aren’t hard to understand. Some in Mr. Trump’s orbit had long worried that his exposure on that front, legally and politically, could well turn out to be higher than his exposure to the Russian collusion charge. On Tuesday, at least, that appeared to be true.

Politically, the results now will be twofold. Republicans in Congress will have to decide whether the Manafort and Cohen court proceedings affect their willingness to protect the president. Odds are they won’t, at least for now.

Yet the Cohen charge now figures to be wrapped into whatever report Mr. Mueller prepares at the end of his investigation, at which point the question will become whether prosecutors have uncovered any actions that could result in impeachment.

And at that point, Democrats hope they will have taken control of Congress and will be in position to make the decision. Ironically, Mr. Trump was in West Virginia trying to ensure that Democratic takeover doesn’t happen.