Three Republicans are seeking their party’s nomination: businessman Gabriel Gomez; Michael Sullivan, a former U.S. attorney and Plymouth district attorney; and state Rep. Daniel Winslow.
Gomez has been highlighting his bootstraps story, business experience and his service in the military.
Sullivan has been campaigning as a conservative, earning him attacks from Democrats for being out of step with Massachusetts.
Winslow, a former Wrentham District Court judge and former lawyer in Mitt Romney’s administration, has tried to present himself as an ideas-driven Republican who will look out for small business.
Secretary of State William Galvin said yesterday that his ‘‘best guess’’ is for about 550,000 voters across the state to take part in today’s Democratic primary, down from the nearly 670,000 who cast Democratic ballots in the 2009 special primary following the death of Sen. Edward Kennedy.
Galvin notes that both Markey and Lynch have strong get-out-the-vote operations that could drive up turnout.
He predicts that about 200,000 people will cast votes in the Republican primary.
The winners of today’s primaries will advance to the June 25 special election.
Staff writer Douglas Moser contributed to this report. Material from The Associated Press was used in this report.
Staff writer Jonathan Phelps can be reached at 978-338-2527 or by email at firstname.lastname@example.org. Follow him on Twitter at JPhelps_SN.