Tennessee Democrat Phil Bredesen is facing backlash from some of the staunchest supporters of his Senate campaign after coming out in support of Brett Kavanaugh’s confirmation to the Supreme Court.

Campaign volunteers have been calling to cancel door-knocking and phone-banking shifts for Bredesen since his statement backing Kavanaugh, according to an internal spreadsheet maintained by the campaign and obtained by POLITICO. At least 22 volunteers so far have reached out to express frustration with the decision, according to the spreadsheet. POLITICO spoke with five who contacted the campaign to vent their anger.

It’s a small fraction of Bredesen’s total volunteer force, which numbers in the thousands, according to his campaign. But it’s also just one slice of the frustration roiling Democrats since Kavanaugh was confirmed to the Supreme Court last weekend.