Joseph Kennedy III walks toward the Newton Center Green Line...

Joseph Kennedy III walks toward the Newton Center Green Line MBTA Station, in Newton, Mass., to greet commuters. Kennedy, the grandson of late Robert F. Kennedy, launched his campaign for the Massachusetts congressional seat now held by retiring U.S. Rep. Barney Frank. (Feb. 16, 2012) Credit: AP

Joseph Kennedy III has launched his campaign for the Massachusetts congressional seat now held by retiring U.S. Rep. Barney Frank.

Kennedy released a video announcement on his website Thursday before heading out on a campaign swing through the 4th Congressional District.

Kennedy started by greeting commuters at the Newton Center MBTA Station and talking to customers at a nearby diner. He is scheduled to make stops later in Milford, Attleboro, Taunton and Westport.

Kennedy is the son of former U.S. Rep. Joseph Kennedy II and a grandson of the late Robert F. Kennedy.

He told commuters he's proud of his family's legacy, but knows he has to earn voter support. He cited his late great-uncle Sen. Edward M. Kennedy as an example of how to reach across the aisle.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

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