I remember thinking this was a pretty conservative board at one point. I tend to be liberal, but I don't support any party and am not very knowledgeable about politics, so I didn't comment much back then. Three things happened when Trump came along:
(1) Some of the smarter conservatives left because Trump is a nut job and a fraud and not really a conservative but rather an egomaniac who is incapable of thinking beyond himself. They couldn't defend him and they still disliked the other side, so there was nothing left for them,
(2) A few people started becoming more liberal for various reasons
(3) Most of the conservatives who actually supported Trump were just trolls who didn't contribute anything. Thus they were chased away.
I think if the Republican party drops Trump and gets back to talking serious issues again, you'll see some conservatives return and there might be good debates again.