Over 3,000 supporters Sen. Bernie Sanders came out to rally for the White House hopeful in Cedar Rapids, Iowa Saturday night, a showing that the Vermont senator’s backers said is all the polling needed to show the momentum that’s made Sanders a frontrunner in the 2020 Democratic presidential primary.

“Our campaign has officially held the three largest rallies in Iowa,” Bernie 2020 Iowa state director Misty Rebik said in a statement. “We’ve knocked over half a million doors in the last month. That is what we mean by ‘Not Me, Us.'”

Sanders was expected Saturday night to place first in the influential and “gold standard” Des Moines Register/CNN/Mediacom Iowa Poll, but the poll was shelved after the campaign of former South Bend, Indiana mayor Pete Buttigieg claimed a supporter had encountered an irregularity with the pollsters.

“Release the poll or don’t, I think we’ve got a pretty good idea already of who’s ahead,” tweeted Iowa Starting Line editor Pat Rynard.

Turnout at the Cedar Rapids event stunned observers.