The first Republican primary debate will be moderated by Fox News mainstays Bret Baier and Martha MacCallum. Baier, who is the chief political anchor for Fox News and the host of "Special Report With Bret Baier," joined the network in 1998 and has moderated previous GOP primary debates. MacCallum, on the other hand, is a news anchor for Fox News and has experience in moderating debates. However, the moderators will face challenges during the debate, including personal attacks from candidates and grievances about perceived biases. The absence of former President Donald Trump, who will be participating in an online interview with Tucker Carlson instead, adds another layer of scrutiny for the moderators. Despite this, Baier assured that even if Trump doesn't physically participate, his presence will still be felt through sound bites and candidates responding to his remarks. The network plans to play clips of Trump throughout the debate to satisfy the audience's desire for all things Trump.