Al Gore's Friends and Former Aides Eyeing 2016 Race

The former Vice President once ran in 2000 and lost.

The adviser cautions that there have been no formal or even informal moves by Gore himself -– but that the former vice president has not ruled out anything. This was first reported by BuzzFeed.

The Gore conversations are not as far along as those for Biden, who has also not ruled out a run.

A Gore spokeswoman told the Tennessean newspaper that the former vice president is not exploring a run.