Warren is not the only contender being formally vetted at this point.
The Massachusetts senator, considered a leader among progressives, campaigned with Clinton today for the first time since endorsing her earlier this month.
If Clinton picks Warren as her vice president, Clinton would make history again. Two women have never headlined a major party’s presidential ticket.
Throughout the primaries, Clinton has had trouble garnering the votes of independents and young voters. If she chooses Warren, that could be viewed as an effort to win over Bernie Sanders' supporters because, like Sanders, Warren rails against Wall Street and speaks often of the plight of America’s middle class.
Warren has been a vocal opponent of Trump in recent weeks, openly engaging in debates with the him over social media.