Around a third I guess.
A more interesting hypothetical question is, which posters would be in his buddy list?
There should be a GeekCode(tm) for this:
TRP---- I am Jon Stewart
TRP--- I will vote for literally anyone else of either party
TRP-- I will vote for literally any Democrat to defeat him
TRP- He's a menace, but no worse than any other Republican
TRP I'd vote for him, but I'm not gonna tell anyone else to
TRP+ He's the GOP nominee, so I'll support him
TRP++ I'm glad he's the GOP nominee. He was the best of the lot.
TRP+++ Donald Trump will make America great again. I back him over anyone else.
TRP++++ I am President Johnson