With her announcement 13 months before the Iowa caucuses, Elizabeth Warren, who became a progressive star by taking on Wall Street after the 2007 financial crisis and, more recently, President Donald Trump, is the first Democrat with a national profile to take formal action towards a likely presidential campaign.
https://www.cnn.com/2018/12/31/politics/elizabeth-warren-exploratory-committee-2020/index.html
https://en.m.wikipedia.org/wiki/Political_positions_of_Elizabeth_Warren