Trump has flailed his way all the way into the appointment of a special counsel and a press corps whipped up into a near-Watergate-level frenzy. Now, it doesn’t necessarily matter whether Trump’s campaign colluded with the Russians or not. If Democrats take the House with anything like a comfortable majority, they may well impeach him based on an obstruction case — i.e., all the things he did in reaction to the Russia story rather than the Russia story itself.