Republican US Senate nominee Gabriel Gomez shook hands with the crowd after giving his victory speech in Cohasset.

Democratic US Senate candidate Edward Markey and his wife, Susan Blumenthal, celebrated after Markey won the Democratic primary for the open US Senate seat.

Stephen Lynch, accompanied by his wife, conceded to Edward Markey at his headquarters in Dedham.

Republican candidate for US Senate Daniel Winslow waved to his audience at the conclusion of his concession speech in Boston.

Republican Michael Sullivan, right, accompanied by his wife, Terry, conceded victory to opponent Gabriel Gomez.

Janet Leombruno of Framingham, left, and Ann Evans of Dover watched the election results come in at the Red Lion Inn in Cohasset.

From left: Linda Broadford, Judy Kendall, and Dawn Piche cheered after the race was called for Edward Markey.

A voter departed a polling station on Beacon Hill.

Daniel Winslow worked the phones on election day at his campaign office in Boston.

Michael Sullivan greeted campaign volunteers at a Plymouth polling station.

Gabriel Gomez chatted with 3 year-old Lindsey Goldfine of Needham during his stop at a Newton ice cream shop.

US Representative Edward Markey and his wife, Susan Blumenthal, arrived at the Community Room in Malden to vote.

Markey cast his ballot in the Democratic primary for the US Senate seat formerly occupied by John Kerry.

A voted filled out a ballot in Malden.

As of 11 a.m., only 112 people had voted at the Malden location.

At the Bridgewater Middle School, Rebecca Johnson voted as her son, Kyle, ate a snack.

State Representative Daniel Winslow cast his ballot at the Freeman-Kennedy School in Norfolk.

Daniel Winslow and his wife, Susan, left the polling place in Norfolk. Winslow sought the Republican nomination.

US Representative Stephen F. Lynch and his wife, Margaret Shaughnessy Lynch, headed to the polls in South Boston.

Voters took the first step today in choosing a Senate successor to John F. Kerry.

Stephen Lynch faced off against US Representative Edward Markey in the Democratic primary.

Lynch and his wife, Margaret, voted at the Foley Apartments in South Boston.