This combination of photos, from top left, shows Republican presidential candidates Jeb Bush, Ben Carson, Chris Christie, Ted Cruz, Mike Huckabee and from bottom left, John Kasich, Rand Paul, Marco Rubio, Donald Trump and Scott Walker. The candidates are scheduled to participate in a Fox News Channel Republican presidential debate on Thursday, Aug. 6, 2015. (AP Photos/File)

GOP Presidential Debate Roster

These GOP presidential candidates are scheduled to participate in a Fox News Channel Republican presidential debate on Thursday, Aug. 6, 201…