Who was the biggest loser of the main Fox Business Debate?

[Vosem]

Nobody's been voting for Carson on the strength/weakness of his debate performances. It didn't matter when he was at 25%, it didn't matter now.

Kasich came off as basically competent, but he (along with Carson) didn't really engage with the other candidates. Kasich is going for the Huntsman constituency and hoping that's enough to at least place second and keep his campaign going after NH. What he needed to do was not blow it. He didn't blow it.

The biggest loser, of course, was Jeb Bush, whose attacks on Trump came off as weak and ridiculous. Yes, the audience booed Trump when he insulted Bush, but make no mistake that Bush is only continuing to decline. At this point Christie and Kasich both seem likelier than Bush to supplant Rubio as the eventual establishment candidate (whatever being establishment candidate is worth in this race).