He won't be impeached because the GOP controls Congress and he makes a nice distraction for McConnell / Pence / Ryan / Bannon (the Four Horsemen of the Apocolypse) to destroy the country without people noticing.
Unless by some miracle his disastrous policies don't ruin the country. I mean the best he can hope for is meh. That's his bar. His goal is to be meh and I think that's still too lofty
I'm going by past trends. We thought Hillary would beat the 2 dem terms then republican president trend and that didn't happen. The electoral college will give Trump a second term