Massachusetts Sen. Ed MarkeyEdward (Ed) John MarkeyYoung insurgents aren't rushing to Kennedy's side in Markey fight Ocasio-Cortez endorses Markey in Senate race amid speculation over Kennedy candidacy House votes to block drilling in Arctic refuge MORE (D) has won reelection, defeating Republican challenger Brian Herr, according to multiple projections. 

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Markey was seeking a full, six-year term after winning a special election last year to fill the Senate seat vacated when John Kerry became secretary of State.

Before moving to the upper chamber, Markey served three decades in the House.