WASHINGTON — Massachusetts Sen. Elizabeth Warren announced the formation of an exploratory committee for a presidential run, making her the highest profile Democrat to formally move toward a bid for the White House in 2020.

"If we organize together, if we fight together, if we persist together, we can win. We can and we will" Warren told supporters in a video posted online Monday morning.

Warren has long been viewed as a potential 2020 candidate. The former law professor is expected to be part of a large field of Democratic contenders that could include former Vice President Joe Biden, Texas Rep. Beto O'Rourke and Sen. Bernie Sanders, the runner-up in the 2016 Democratic primary.