JOE BIDEN

To parents of active-duty soldiers and veterans, U.S. President Barack Obama's decision to keep thousands of troops in Afghanistan was much more than politics.

Any U.S. presidential campaign run by Vice President Joe Biden would be an "optimistic campaign," says former U.S. Sen. Ted Kaufman, one of his advisers and close friends.

"Face the Nation" host John Dickerson is lined up to moderate the second Democratic Party debate Nov. 14 at Drake University in Des Moines, Iowa.

The Hillary Clinton campaign and Donald Trump live-tweeted, while Sanders' campaign paid to promote the Twitter trend #DebateWithBernie.

Even when O'Malley slighted Clinton, he took a cordial approach.

Toward the end of the Democratic debate Tuesday night, Bernie Sanders and Hillary Clinton both called for fewer prison sentences for people who smoke marijuana.

Hillary Clinton gained an unlikely ally in Bernie Sanders on Tuesday night in her bid to steer the national conversation away from her private-server controversy.

Vermont Sen. Bernie Sanders came out swinging when asked about income inequality during Tuesday's Democratic debate in Las Vegas.

Here are some of the best reactions from Twitter as the Democratic candidates debated in Las Vegas.

Compared with their Republican counterparts, Democratic candidates will likely get more time to illustrate points during their first debate.

The super PAC pulled its last ad about Biden's experience with personal tragedy after an aid to the vice president requested it.

The first Democratic debate will air Tuesday night, featuring front-runners Hillary Clinton and Bernie Sanders.

Vice President Joe Biden is not expected to participate in the first Democratic debate, but organizers are setting aside a lectern just in case.

The live-stream of the debate will be offered online on CNN.com's homepage, on the CNN Politics' live blog and across mobile platforms, in addition to the television stations CNN, CNN International and CNN en Español.

The presidential candidate's lead over Bernie Sanders has narrowed, according to a poll.

President Barack Obama may be greeted by gun rights protesters when he visits Roseburg, Oregon, Friday to comfort survivors of last week's mass shooting.

Hillary Clinton was heckled Thursday by Hispanic activists who accused her of taking money from private prisons.

“Democrats really are pretty content with the current field of candidates for president," a polling official said.

After Thursday's deadly shooting in Roseburg, a letter he had written years ago to Vice President Joe Biden -- defending gun ownership rights -- drew strong reactions.

The Sanders campaign made the announcement on Reddit. The average donation, the campaign said, is $33.51.

An announcement by CNN details the candidate criteria for the first Democratic presidential debate.