Funny how this is probably the clearest divide between the Democrats and Republicans but you'll still have OT dumbshits claiming they're the same, even on LGBT issues.
Came up a while ago where some guy was trying to say "well not ALL Republicans oppose gay marriage anod not ALL Democrats support it." When I showed him that all but one of the Democratic senators supported it and all but one of the Republican senators (I believe Portman at the time, though that's expanded to 3-4 by now) he took it as "Oh see look, it's not universal!" as if that 3% margin of error is significant enough to go BOTH PARTIES ARE THE SAME
Weirdly, the Wikipedia article on this was fully deleted, but from memory, I believe the only (currently elected) support for gay marriage from Republicans is:
Congressman:
Richard Hanna
Ileana Ros-Lehtinen
Bob Dold
Chris Gibson
Senators:
Rob Portman
Mark Kirk
Lisa Murkowski
Susan Collins
Governors:
Charlie Baker
(Rauner and Hogan are like, eh!)
I might be missing someone. But like, it's not a very long list.
EDIT: Going through the amici on republicans supporting gay marriage for Obergefell and adding a few more random congressmen I didn't realize/know supported.