Mitt Romney is backing state Rep. Jeff Perry in the GOP primary in Rep. Bill Delahunt's (D-Mass.) district.

Delahunt's retirement has led candidates to flood the race, including on the GOP side, where Perry faces a primary with former state Treasurer Joe Malone.

Romney chose Perry over Malone on Monday, citing their work together when Romney was governor in the mid-2000s.

"As Governor, I worked closely with Jeff on initiatives to reduce spending, lower taxes, and reform government," Romney said. "He will be a strong conservative voice against the Washington culture of higher taxes, higher spending, and higher debt.  I am looking forward to the contributions he will make in the U.S. House of Representatives."

Romney's political action committee is donating $2,500 to Perry's campaign, with the funds being devoted to the primary.