![Patrick Semansky FILE - Democratic presidential candidate former Vice President Joe Biden checks his watch during the second and final presidential debate Oct. 22, 2020, at Belmont University in Nashville, Tenn., with President Donald Trump. (AP Photo/Patrick Semansky, File)](https://mapi.associatedpress.com/v2/items/fb1718a271fa4b2da17c1c2ed3a4e7b8/preview/preview.jpg?s=680x)
FILE - Democratic presidential candidate former Vice President Joe Biden checks his watch during the second and final presidential debate Oct. 22, 2020, at Belmont University in Nashville, Tenn., with President Donald Trump. (AP Photo/Patrick Semansky, File)
![Ron Edmonds FILE - President George H.W. Bush looks at his watch during the 1992 presidential campaign debate with other candidates, Independent Ross Perot, top, and Democrat Bill Clinton, not shown, at the University of Richmond, Va., Oct. 15, 1992. (AP Photo/Ron Edmonds, File)](https://mapi.associatedpress.com/v2/items/0f614d1a7fe746738be6a93bc0ca7ce0/preview/preview.jpg?s=680x)
FILE - President George H.W. Bush looks at his watch during the 1992 presidential campaign debate with other candidates, Independent Ross Perot, top, and Democrat Bill Clinton, not shown, at the University of Richmond, Va., Oct. 15, 1992. (AP Photo/Ron Edmonds, File)
![Ron Edmonds FILE - Sen. Lloyd Bentsen, D-Texas, left, shakes hands with Sen. Dan Quayle, R-Ind., before the start of their vice presidential debate at the Omaha Civic Auditorium, Omaha, Neb., Oct. 5, 1988. (AP Photo/Ron Edmonds, File)](https://mapi.associatedpress.com/v2/items/de4e2ed4b7dd4a45a7b736db61adf66f/preview/preview.jpg?s=680x)
FILE - Sen. Lloyd Bentsen, D-Texas, left, shakes hands with Sen. Dan Quayle, R-Ind., before the start of their vice presidential debate at the Omaha Civic Auditorium, Omaha, Neb., Oct. 5, 1988. (AP Photo/Ron Edmonds, File)
![Uncredited FILE - Jimmy Carter, left, and Gerald Ford, right, shake hands before the third presidential debate, Oct. 22, 1976, in Williamsburg, Va. (AP Photo/File)](https://mapi.associatedpress.com/v2/items/54eeea37cdaa4cf6b6d83aed5e79b328/preview/preview.jpg?s=680x)
FILE - Jimmy Carter, left, and Gerald Ford, right, shake hands before the third presidential debate, Oct. 22, 1976, in Williamsburg, Va. (AP Photo/File)
![Patrick Semansky FILE - President Donald Trump and Democratic presidential candidate former Vice President Joe Biden participate in the final presidential debate at Belmont University, Oct. 22, 2020, in Nashville, Tenn. (AP Photo/Patrick Semansky)](https://mapi.associatedpress.com/v2/items/0302aed3302b42a48194d82060ed9de8/preview/preview.jpg?s=680x)
FILE - President Donald Trump and Democratic presidential candidate former Vice President Joe Biden participate in the final presidential debate at Belmont University, Oct. 22, 2020, in Nashville, Tenn. (AP Photo/Patrick Semansky)
![Ron Edmonds FILE - President Ronald Reagan, left, and his Democratic challenger Walter Mondale, shake hands before debating in Kansas City, Mo., Oct. 22, 1984. AP Photo/Ron Edmonds, File)](https://mapi.associatedpress.com/v2/items/9dbb3f8a13ef424b9392f02196919096/preview/preview.jpg?s=680x)
FILE - President Ronald Reagan, left, and his Democratic challenger Walter Mondale, shake hands before debating in Kansas City, Mo., Oct. 22, 1984. AP Photo/Ron Edmonds, File)