New England Democrats have thrown their support behind a walkout of an estimated 31,000 employees of the Stop & Shop grocery chain. The workers, part of the United Food and Commercial Workers, went on strike Thursday following months of unsuccessful contract negotiations.

Sen. Elizabeth Warren, D-Mass, brought doughnuts to strikers at a Somerville, Mass., store on Friday. “@StopandShop workers deserve fair wages and good benefits—and I’m behind them 100% of the way. I stand in solidarity with @UFCW and the 31K workers who are making their voices heard,” she tweeted.