Joe Biden came in fourth place in a poll of likely Iowa Democratic caucuses voters released Friday, adding to signs that the former vice president and the one-time front-runner is in danger of showing poorly in the first-in-the-nation state nominating contest.

Massachusetts Sen. Elizabeth Warren led the field in the New York Times/Siena College Iowa poll released Friday, with 22% support, followed by Vermont Sen. Sanders at 19%, South Bend, Indiana, Mayor Pete Buttigieg at 18%, and Biden at 17%.