Vice President Kamala Harris will make her first campaign appearances with Barack Obama and Michelle Obama, two of the most popular figures in the Democratic Party, at get-out-the-vote events this month in Georgia and Michigan.

With America's Electoral College system, most modern presidential contests come down to five-figure vote tallies in a half-dozen or so crucial "swing" states. Anyone doubting the outsized

Former President Jimmy Carter, the first president in U.S. history to reach the age of 100, cast an early vote in Georgia.