Voting in Denver on Election Day 2014.

(AP Photo/David Zalubowski)

President Barack Obama has no more election battles to fight before he leaves the White House in January 2017. Candidates are lining up to replace him -- some have already come and gone. We're linking here to coverage of all candidates from both parties. Click on their names to read the stories.

The Democrats

Lincoln Chafee​ (Dropped out of the race Oct. 23)

Lincoln Chafee.

(AP Photo/File)

Hillary Clinton 

Hillary Clinton.

(AP Photo/File)

Martin O'Malley 

Martin O'Malley.

(AP Photo)

Bernie Sanders 

Bernie Sanders.

(AP Photo/File)

Jim Webb (Withdrew from the race Oct. 20) 

Former Sen. Jim Webb.

(AP Photo/Patrick Semansky/File)

The Republicans

Jeb Bush 

Jeb Bush.

(AP Photo/File)

Ben Carson 

Ben Carson.

(AP Photo/File)

Chris Christie

New Jersey Gov. Chris Christie.

(AP Photo/Julio Cortez/File)

Ted Cruz 

Ted Cruz.

 (AP Photo/File)

Carly Fiorina 

Carly Fiorina.

(AP Photo/File)

Jim Gilmore

Former Virginia Gov. Jim Gilmore

(AP Photo/File)

Lindsey Graham 

Lindsey Graham.

(AP Photo/File)

Mike Huckabee 

Mike Huckabee.

(AP Photo/File)

Bobby Jindal

Bobby Jindal.

(AP Photo/File)

George Pataki 

George Pataki.

(AP Photo/File)

Rand Paul 

Rand Paul.

(AP Photo/File)

Rick Perry  (Withdrew from the race Sept. 11)

Republican presidential candidate, former Texas Gov. Rick Perry, speaks at the Western Conservative Summit, hosted by the Centennial Institute, Colorado Christian University's think tank, in Denver, Saturday, June 27, 2015. 

(AP Photo/Brennan Linsley)

Marco Rubio 

Marco Rubio.

(AP Photo/File)

Rick Santorum 

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum speaks Friday, June 19, 2015, at the Northeast Republican Leadership Conference in Philadelphia. 

(AP Photo/Matt Rourke)

Donald Trump 

Donald Trump.

(AP Photo/File)

Scott Walker 

Wisconsin Gov. Scott Walker. 

(AP Photo/Nam Y. Huh/File)