Nearly 4,000 progressive activists gathered at Netroots Nation in Philadelphia last week.
They met to strategize and hear from some of the most outspoken Democrats on the party's left flank.
Business Insider said attendees at Netroots overwhelmingly aligned with the more progressive wing of the party.
But some remain undecided about their 2020 primary vote.
"I'm here for Kamala Harris or Elizabeth Warren," Chris Petzold, a Washington state Indivisible chapter founder, told INSIDER.
"I really want to see a woman in the White House next, I think it's beyond time."