And the third group, the pure hyper-partisans who are just happy there is a GOP president, period.
Also, this is a bit like out of the frying pan into the fire - the GOP in Congress are basically pro-trade, pro-immigration, and (for the most part) not really that racist or sexist or xenophobic (caveat: almost all GOP policies are intrinsically discriminatory because they support the wealthy which are primarily white men.) They are itching to wreak havoc on the entitlement systems and federal spending.
Right now Trump's limousine liberal philosophies are standing in their way. If Trump has no power because he has no constituency, they'll just shove all these terrible economic policies down our throat.
The worst things that could happen right now are:
Trump starts acting like a sober, quiet Mitt Romney - suddenly he's back to 45% in the polls, everybody's praising him for doing his fucking job and he and Congress start kicking the poor, the sick, the young, and the brown around. (Probability: 15% - it could definitely happen.)
Trump goes berserker and slips below 35% in the polls and now he's at the mercy of Congress to make him look Presidential. (Probability: 65%)
And the third option is he kind of lingers in this limbo of die-hard support, job growth, and light treason and we make it to the 2018 elections in one piece. (Probability: 20%.)
Right now we're at a sweet spot where the GOP can't get anything done because they put this guy in instead of Jeb Bush. Unfortunately, the honeymoon is wearing off and Congress is going to take Trump (and America) out to the woodshed this summer.