Presidential Debate 2015 Candidates
Tonight on FOX News at 8:50 p.m. ET is the first Republican Presidential Debate of 2015 and the top 10 primary candidates will battle it out in front of America. To watch the debate online, click here for all the live stream and app info. Now click through our gallery to check out all the candidates who are participating in tonight's big event. (Photo by Darren McCollester/Getty Images)