Vandals smashed several windows at the Stanislaus County Democratic Central Committee headquarters late Friday or early Sunday.
Committee Chairman Mike Burtch said vandals destroyed five of the 11 windows of the building at 500 Scenic Drive. "This was not some drive-by," he said. "It was a concerted effort. One (window) is safety glass and they worked very hard to smash through it."
The committee filed a police report and is waiting to hear from its insurance company for a damage estimate.
The windows displayed signs for Democrats running for office or re-election, such as Sen. Barbara Boxer.
Burtch said the vandals did not enter the building and nothing was taken.