State Sen. Anthony Hardy Williams' mayoral bid has won the endorsement of Philadelphia Teamsters District Council 107.

The Teamsters will gather at 11 a.m. Monday at the Philadelphia Regional Port Authority on North Delaware Avenue to rally for Williams' mayoral campaign.

The Teamsters local said in a news release Sunday they were supporting Williams because he was raised in a union family and has voted against anti-union provisions of the paycheck protection bill in the state House. Williams has also been a public supporter of raising the minimum wage and of pay equity for women, the Teamsters said in the release. Both of Williams' grandparents were members of the American Postal Workers Union.

Williams is running in the Democratic primary against former city Councilman Jim Kenney, former District Attorney Lynne M. Abraham, former Common Pleas court Judge Nelson Diaz, former city spokesman Doug Oliver, the Rev. Keith Goodman, and former State Sen. T. Milton Street.

The primary is May 19.

- Julia Terruso