Webster City, Iowa (CNN) - As Newt Gingrich denies he was paid to lobby Republicans for mortgage giant Freddie Mac, fellow Republican presidential candidate Michele Bachmann on Wednesday challenged Gingrich's denial.
"Whether former Speaker Gingrich made $300,000 or whether he made $2 million, the point is that he took money to also influence senior Republicans to be favorable toward Fannie and Freddie," Bachmann said after a campaign event in Webster City, Iowa.
The congresswoman was referencing payments to the Gingrich Group - amounts between $1.6 million and $1.8 million, CNN has confirmed. The payments, first reported by Bloomberg, were made from 1999 to 2002 and 2006 to 2008.
In recent days Gingrich has steadfastly denied he lobbied the agency amid the subprime mortgage crisis, saying instead he offered advice as a "historian" and that his group offered "strategic advice."
Yet Bachmann cast an unfavorable light on Gingrich's actions.
"While he was taking that money, I was fighting against Fannie and Freddie," Bachmann said.
The congresswoman also lumped Gingrich in with her other GOP rivals, saying that each would not be able to claim higher ground, on some issues, in debates against President Barack Obama.
"Whether it's Freddie and Fannie or whether it's being against the Wall Street bailout, on every single issue, that's important to the voters in this upcoming election, I take every issue off the table with Barack Obama," Bachmann said. As she often does, the congresswoman talked about "flip-flopping" and one candidate creating the blueprint for "Obamacare" - both references to former Massachusetts Gov. Mitt Romney.
"I'm the only candidate, in the entire field, that doesn't have any issue of compromise with President Obama…I'm consistent and they won't find any policy surprises in my background," Bachmann said.
–CNN's Rebecca Stewart contributed to this report