Joe Biden’s super PAC, which just announced plans to air its first ad in Iowa this week, was formed in October as the former vice president struggled to keep up with the fundraising of fellow frontrunners like Bernie Sanders and Pete Buttigieg.

When Biden’s campaign announced it was no longer opposed to supporters forming super PACs, the reversal was quickly denounced by some of the former veep’s opponents, who have relied on grassroots donations to finance their operations.

“I don’t need a super PAC,” Sanders said at an Iowa town hall shortly after Biden announced the change. “I am not going to be controlled by a handful of wealthy people. I will be controlled by the working people of this country.”