BOSTON (AP) — The Governor's Council has officially certified the election of Democratic congressman Edward Markey to the U.S. Senate.

The formal vote by the eight-member council on Wednesday clears the way for Markey to be sworn-in to the Senate on Tuesday.

Markey, a member of the U.S. House since 1976, defeated Republican Gabriel Gomez in the June 25 special election for the seat that had been held by John Kerry.

The 66-year-old Markey is expected to resign his House seat in the coming days, clearing the way for another special election to be scheduled in the 5th congressional district this fall. Five Democrats and one Republican have announced plans to run for Markey's seat.

William "Mo" Cowan has served as interim senator since Kerry's resignation to become U.S. Secretary of State.