South Bend, Indiana, Mayor Pete Buttigieg took the lead for the first time in the latest Democratic primary poll out of Iowa. The Des Moines Register/CNN/Mediacom poll, released Saturday, showed the mayor surging to the top ahead of Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.) and former Vice President Joe Biden. Buttigieg received support from 25 percent of likely Iowa caucusgoers in the poll, a startling 16 point leap from his September standing. Warren, who was leading the September poll, fell by six points to 16 percent, while Biden and Sanders were right behind her at 15 percent. Biden, the early frontrunner, fell another five percentage points, but Sanders picked up four.

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