After a summer of campaigning, primary day is here in Massachusetts.

Candidates for statewide offices, including governor and secretary of state, and federal offices, including U.S. House, are out making their case to be on November's ballot. There are also many contested state legislative primaries.

Polls across the state are open until 8 p.m. If you're still not sure where to vote or who's running, check out our voter guide.

About 12 percent of registered voters in Boston — roughly 400,000 people — have cast their ballots as of 3 p.m.

Once polls close, we'll have full results here on wbur.org.

More photos:

Chase Conley picks up his ballot after he checks in at voter registration at Somerville High School. (Jesse Costa/WBUR)

A supporter of Congressman Michael Capuano crosses the street with a hand full of signs in the early morning on primary election day. (Jesse Costa/WBUR)

Ayanna Pressley, who is running against Capuano for Congress, talks with reporters outside the Adams Street Library in Dorchester. (Robin Lubbock/WBUR)

With supporters behind him, U.S. Rep. Michael Capuano speaks with the media outside of Trum Field in Somerville in the early morning of primary voting day. (Jesse Costa/WBUR)

Campaign boards outside the Adams Street Library in Dorchester (Robin Lubbock/WBUR)

Josh Zakim, candidate for secretary of state, talks with voters outside the Lilla G. Frederick Pilot Middle School in Dorchester. (Robin Lubbock/WBUR)