2020 Update
According to a Monmouth University Poll released Thursday, “Former Vice President Joe Biden maintains a lead in [Iowa], but Massachusetts Sen. Elizabeth Warren is hot on his heels while Vermont Sen. Bernie Sanders has slipped down the leaderboard… Biden continues to lead the Democratic field with 28% support… Warren is now closing the gap at 19% support, up from 7% four months ago. Support for Sanders has gone in the opposite direction, now at 9% compared with 16% in April.” (Monmouth University)
The left sees Biden as the current frontrunner...