Warren will be one of the prime movers in the 2020 election. She will decide whether she wants to run or not and then lots of other people -- including many below her on this list -- will make their own plans accordingly. What Warren has that no one else does: A nationally known name, a massive fundraising base and a demonstrated liberal record. Lots of liberals wanted her to primary Hillary Clinton in 2016 but Warren passed, leaving the door open to the surprising success of Bernie Sanders, who ran on, essentially, Warren's message. Warren would be 71 on election day 2020 but Trump would be 74, taking age entirely off the table as an issue.
1. Elizabeth Warren
FILE - In this Thursday, Dec. 15, 2016 file photo, Sen. Elizabeth Warren, D-Mass. listens to a question during an interview at her office in Boston. Warren said Friday, Jan. 6, 2017, that she will run for re-election in 2018. (AP Photo/Charles Krupa, File)
