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The GOP debate lineup in tonight's CNN debate - the second Republican primary debate of 2015 - features 15 candidates.
This will mark the second clash between the hotly contested GOP field in 2015. Similar to the first debate on FOX Newson Aug. 6, there will be two separate debates. One "undercard," or "kids' table," debate will be held at 6 p.m. ET and finish at 7:45 p.m. The "prime-time" battle will begin at 8 p.m. ET.