DEMOCRATIC_CONVENTION_11186791.JPG Democratic Massachusetts Gov. Deval Patrick said he will announce a temporary appointment to fill John Kerry's Senate seat this Wednesday. That person will represent the Bay State in the U.S. Senate until the special election to fill the remainder of Kerry's term is held on June 25. (AP File Photo) When Massachusetts Gov. Deval Patrick announces who will fill Sen. John Kerry's seat on Wednesday, that person will instantly gain a distinction which they'll carry through the end of their life- the title of "United States senator." With the Senate expected to vote Tuesday to confirm Kerry as the next secretary of state, Patrick's appointed pick will serve until June 25, when the Massachusetts voters choose their third senator in four years.