Finally I found it! This is the debate which decided me against Trump, Cruz, Paul. But on Jan 14 maybe they will say stuff and I'll change. Meanwhile, you can refresh yourself by viewing the December 15 debate. That link below now sports other versions of the same debate with about 8 extra minutes (preamble), in case the one below is glitchy or you want another Youtuber's post of the full debate. Enjoy.
If you prefer closed captioning, here: