Face to face: Trump and Biden to meet for final debate

A camera operator is seen near his rig during a rehearsal tests ahead of the final presidential debate between Republican candidate President Donald Trump and Democratic candidate former Vice President Joe Biden, Wednesday, Oct. 21, 2020, in Nashville, Tenn. The debate will take place Thursday, Oct. 22 at the Curb Event Center at Belmont University. (AP Photo/Julio Cortez)

NASHVILLE, Tenn. — President Donald Trump and his Democratic challenger, Joe Biden, are set to square off in their final debate today, one of the last high-profile opportunities for the trailing incumbent to change the trajectory of an increasingly contentious campaign.