The debate is over. Thanks for joining us. For more debate coverage, check out:
Rubio Says Trump Is 'Not Conservative' but Can't Explain Why: The billionaire developer seems to support the principles that the Florida senator mentioned, by Jacob Sullum
Donald Trump Says Military "Won't Refuse" His Orders to Commit War Crimes: At GOP debate, merely pledging boots on the ground in Libya passes for sanity, by Anthony L. Fisher
Donald Trump's Deficit Reduction Numbers Are Total Nonsense: Trump says he can get $300 billion in cuts from $78 billion in spending. Er, what?, by Peter Suderman
The fearsome foursome of Donald Trump, Ted Cruz, Marco Rubio, and John Kasich take the stage at 9 p.m. tonight in Detroit. The debate will be moderated by Fox News' Bret Baier, Megyn Kelly, and Chris Wallace.