Washington (CNN) - A second Democrat has officially jumped into the race to succeed Sen. Joe Lieberman of Connecticut.
Thursday Rep. Chris Murphy announced that he's a candidate.
"I'm running for the United States Senate. Connecticut deserves a new progressive voice in the Senate who listens to us," says Murphy in a video on a new Senate campaign website.
Murphy's announcement comes one day after the four term Democrat turned independent senator announced that he would not run for a fifth term in the Senate next year.
Murphy, who represents the state's fifth congressional district, located in the north-central and northwestern part of Connecticut, won re-election to a third term in November. He's expected to head to Connecticut later Thursday for an announcement event.
Tuesday former Connecticut Secretary of State Susan Bysiewicz formally announced her candidacy for Lieberman's seat. Rep. Joe Courtney is also considering a bid for the Senate.
On the Republican side, 2010 Senate nominee Linda McMahon, 2010 Senate candidate and former Rep. Rob Simmons, and 2010 GOP gubernatorial nominee Tom Foley are considered potential candidates.
–Follow Paul Steinhauser on Twitter: @psteinhausercnn