Why doesn’t he switch parties?
Because he's a disgusting sleazy slimeball, and WE DON'T WANT HIM.
I don't know why, but it seems like timing is a factor. He missed a chance to do so earlier -- maybe because he thought Clinton would win the presidential election. And now that he's running as a Democrat he can't switch now.
I suspect he may be like a gambler who keeps placing the same bet - maybe for sentimental reasons - and expecting that he will win if he just keeps at it.
If his bet comes through - Dems in control of everything - he's in the front of the line for perks and stuff. If he jumps to the GOP, he's at the end of the line. So maybe it's not just sentimentalism and nostalgia that keeps him a Democrat.
You really ARE Sybil!! He’s a DEMOCRAT...THEY LIE...HE LIES!!! He is no more conservative than Paul Ryan!