Bernie Sanders is holding steady at 24 percent, but Buttigieg is up four points over last night with 23 percent, a virtual tie in a survey with a margin of error of 4.4 percent.

Elizabeth Warren takes over third place with 13 percent, and Joe Biden slips to fourth with 11 percent.

Mayor Pete’s gains don’t seem to be coming at the expense of Sanders, whose numbers haven’t changed much all week. Instead, Buttigieg seems to be attracting registered Democrats. And his biggest gains appear to be raided from key backers of Warren and Biden.