Former President Bill Clinton endorsed Massachusetts Attorney General Martha Coakley’s Senate bid on Sunday and recorded a robo-call on her behalf, less than 48 hours before the primary election.

The call will go out Monday to more than 500,000 primary voters across the Commonwealth. In the message, Clinton reminds residents to vote Tuesday and asks them to voe for Coakley, saying she “fight every day to create jobs with good benefits and health reform with a strong public option.”

Coakley is the favorite to win the Democratic primary in the special election, which will determine who fills the seat vacated by the late Sen. Edward Kennedy (D). Sen. Paul Kirk is currently serving an interim appointment.