To Jestin. At best, I think it would have to be for a 2nd term, since then no one would ever be running against him. But the problem there would be the polls and coattails. Everyone would have to be in on the trick, because you wouldn't want his popularity, and therefore his party's stature, to rise as a result of the constant flattery. We've seen plenty of people who think Moon praised Trump just cause Trump is apparently so great. But if you ignore future elections, yes, I think most Dems could do it. Plenty of Dems said they would happily work with Trump after his election, back when no one had a clue what his policy would really be like. And we have quite a few moderates, esp in the Senate. Typically I think we're the pragmatic party. Even picking Obama over Hillary in '08 was still not so much an idealist move, but picking one moderate over another.
You'd also really need Fox and Friends to be ok with it.