Hillary Clinton, Twitter Account; Democrat Party; Running mate - Tim Kaine
Donald Trump, Twitter Account; Replublican Party; Running mate - Mike Pence
Gary Johnson, Twitter Account; Libertarian Party; Running mate, Bill Weld
Jill Stein, Twitter account; Green Party; Running mate - Ajamu Baraka
Darrell Castle, Twitter account; Constitution Party; Running mate - Scott Bradley
Want to follow the debates? Check out the Commission on Presidential Debates.
What are the candidates spending? Follow the money - the Campaign Finance Institute, Campaign Money, Follow the Money.org