Pete Buttigieg is the top choice of likely Iowa Democratic caucusgoers in a new Monmouth University poll, the first time he topped any state or national poll surveying support for candidates in the crowded presidential field.

The South Bend, Indiana, mayor led the pack with 22% support in the first-in-the-nation caucus state, according to the poll, released on Tuesday. Buttigieg is followed by former Vice President Joe Biden at 19%, Massachusetts Sen. Elizabeth Warren at 18%, and Vermont Sen. Bernie Sanders at 13%. Minnesota Rep. Amy Klobuchar came in fifth place at 5% support, and no other candidate topped 3%.