U.S. Sen. Bernie Sanders of Vermont, a Democratic presidential candidate, tweeted Tuesday about the signs posted in Lewiston that compared mayoral candidate Ben Chin to the former Vietnamese communist leader Ho Chi Minh.

“The racist signs against @BChinME in Lewiston have no place in our society,” Sanders tweeted.

Chin, 30, is a third-generation American who said he was saddened by the signs, which were taken down Monday amid a public outcry.