Elizabeth Warren has been climbing in the Democratic presidential contest by using a stream of policy blueprints and hours of selfies with voters to chip away at her immediate target: Bernie Sanders.
Warren's path to directly challenging front-runner Joe Biden runs through Sanders, her main rival for progressive voters and the candidate who's steadily held the No. 2 spot in most polls.
The Massachusetts senator is making inroads and attracting voters with a flood of detailed proposals on issues from taxing the ultra-wealthy and offering universal child care to breaking up big technology firms and investing in a green economy. She eschews high-dollar fundraisers as a way to bolster her anti-establishment credentials and free up time for virtually limitless conversations with voters at campaign events.