Libertarian presidential candidate Gary Johnson (R) and running mate, Bill Weld (L), talks to a crowd of supporters at a rally on August 6, 2015 in Salt Lake City, Utah.
Green Party presidential candidate Jill Stein and vice presidential candidate Ajamu Baraka hold a "People's Debate" outside Hofstra Univsersity gates.
Democratic presidential candidate Hillary Clinton and vice presidential candidate Tim Kaine greet supporters during a campaign rally at Florida International University Panther Arena on July 23, 2016 in Miami, Florida.
Republican presidential candidate Donald Trump (L) and vice presidential candidate Mike Pence listen to cheers from the audience at the The Hotel Roanoke & Conference Center on July 25, 2016 in Roanoke, Virginia.
Former CIA agent Evan McMullin announces his presidential campaign as an Independent candidate on August 10, 2016 in Salt Lake City, Utah.