PLYMOUTH, Mass. -- Former state Treasurer Joseph Malone officially announced his run for Congress on Sunday.

The Republican is looking to fill the 10th Congressional District seat currently held by U.S. Rep. Bill Delahunt, who announced that he will not seek reelection in November.

Delahunt has represented the state for more than 10 years.

At a rally in Plymouth, Malone said he's campaigning to bring change to the state's congressional delegation.

"We need new people in Washington," said Malone. "Leaders who care more about the next generation than the next election, and with your help, I'll be one of those leaders."

Malone was State Treasurer for most of the 90s. He ran unsuccessfully for governor in 1998.

Two other Republicans, state Rep. Jeff Perry of Sandwich and Ray Kasperowicz, a Cohasset accountant, have also announced they're seeking the GOP nomination for the seat. On the Democratic side, state Sen. Robert O'Leary has announced his candidacy, and Norfolk District Attorney William Keating is weighing an election bid.