Des Moines, Iowa (CNN) - Another Republican has come forward to say that Newt Gingrich personally pressed her and other members of Congress in 2003 to vote for a controversial Medicare prescription drug benefit.
The provision, known as Medicare Part D, passed the House that summer by a narrow margin and eventually took effect in 2006.
The costly legislation helps seniors pay for their prescription drugs under Medicare but is now blamed by many conservatives for exploding the federal deficit.
Former Colorado Rep. Marilyn Musgrave, now a director at the anti-abortion Susan B. Anthony List, said Gingrich called her at the height of the 2003 debate urging her to vote for the bill.
"Newt called me to vote yes," Musgrave told CNN by phone on Wednesday.
"He asked for a yes vote on a Medicare prescription drug benefit," she said. "Dick Armey" – former House Majority Leader – "called me and wanted a no. But I had already made up my mind to vote not to expand an entitlement that we were going to have to pay for down the road."
Musgrave was one of 19 House Republicans who voted against the plan, which passed 220-215.
Two more Republicans who served in Congress at the time, Arizona Rep. Jeff Flake and Idaho Gov. Butch Otter, told the Des Moines Register this week that Gingrich lobbied them to vote in favor of the Medicare provision.
"He told us, 'If you can't pass this bill, you don't deserve to govern as Republicans,' " Flake told the paper. "If that's not lobbying, I don't know what is."
Politico also reported earlier this month that Gingrich was instrumental in getting House Republicans to support the bill.
Gingrich's rivals in the presidential race have accused him of becoming a lobbyist after he left Congress, citing the $1.6 million in fees paid to his consulting firm by Freddie Mac before the collapse of the housing market.
The former House speaker has said he did no lobbying on behalf of the federally backed mortgage company.
Musgrave, who is neutral in the presidential race, said she was one of few Republicans holding out against the prescription drug bill and was facing an onslaught of pressure to support it from GOP House leaders at the time.
But Musgrave said she was not sure if Gingrich was technically "lobbying" when he called her, because she did not know if he was working for anyone else at the time.
"All I know is he wanted a yes," Musgrave said.
Gingrich addressed his support for the bill Wednesday after a campaign event in Iowa.
"I'm allowed as a citizen to say I'd like to see this passed and that's not lobbying," he told reporters in Mason City. "I wasn't paid by anybody to say that. It was a public position I had taken for a practical reason ... That was a public position taken publicly and is literally by definition not lobbying."
Gingrich spokesman R.C. Hammond said the former speaker publicly supported the Medicare proposal at the time and was speaking for himself and not on behalf of any client.
"Newt Gingrich regularly speaks to the Republican caucus on a variety of issues both regarding foreign policy and domestic," Hammond told CNN.
"So the idea of him going up to speaking to caucus members about the prescription drug benefit, and making his argument as a former speaker about why he supports it is not unusual," he added. "He routinely would speak to members and give his counsel on a wide variety of issues, for over a decade."