President-elect Donald Trump has chosen Fox News host Pete Hegseth to lead the Department of Defense. Hegseth is a military veteran and conservative media personality with a large following. He has a close relationship with Trump and has lobbied for the release of service members accused of war crimes. Hegseth is a co-host of Fox News Channel's 'Fox & Friends Weekend' and has been a contributor to the network for a decade. He has also written books, including one that spent nine weeks on the New York Times best-sellers list. Hegseth lacks senior military or national security experience, but he has served in the military and has a master's degree in public policy from Harvard University.