Republican candidate for governor Charlie Baker has won the backing of the Democratic mayor of Quincy, Massachusetts.
Tom Koch, who supported Steve Grossman in the Democratic primary, plans to formally announce his endorsement of Baker Tuesday at the Quincy Center for Innovation.
Koch said Baker understands the challenges and opportunities facing Quincy and other Massachusetts cities.
Reaching out to moderate Democrats and independent voters is critical if Baker hopes to prevail over Democratic Martha Coakley and three other candidates for the state's top office.
Coakley is planning to visit Lawrence on Tuesday to join with Lawrence Mayor Dan Rivera and union members at an early education center.
A little more than 35 percent of voters are registered as Democrats while fewer than 11 percent are registered Republicans.
The election is Nov. 4.