Democratic presidential candidates squared off tonight in their first debate.

Hillary Clinton and Bernie Sanders highlighted a field that also included former Maryland Gov. Martin O'Malley, former Virginia Sen. Jim Webb and former Rhode Island Gov. Lincoln Chafee.

See what some of the Republican presidential candidates thought about the debate below and be sure to tune in to Fox News Channel's two hours of live post-debate coverage, starting at 11p ET.

LINEUP: Here's What You'll See on Fox News After Tonight's Dem Debate

Top Dem Doubles Down on Claim She Was Disinvited from Debate

Fox News Poll: Carson Giving Trump a Run for His Money