I thought he would make it to the next election and still do.
The Mueller probe has not released anything that looks like collusion, beyond that one meeting at Trump Tower. Even if it was illegal, it does not look to me like an impeachable offense. Putin has a lot of support from the right wing. He may have helped Trump in terms of securing low interest loans, but I doubt that there is anything in writing from Trump saying that he planned to return the favors.
As for the 2020 election, everything depends on the state of the economy. By 2020, it should be clear whether corporate tax cuts and trade wars benefit most Americans. My gut feeling is that this is a hurtful policy, but I am no expert. We will just have to wait to see how things play out.