(Reuters) – The top Republican in the U.S. Senate Banking committee took aim again at President Joe Biden’s nomination to a high-ranking Federal Reserve position, Sarah Bloom Raskin. She claimed she improperly lobbied for a Fintech company on the Kansas City Fed’s board.

Dennis Gingold, founder of Fintech, spoke out to Reuters on Friday, saying that Senator Pat Toomey had made an “unfair” account and that Fed vice-chair of supervision Raskin had acted correctly and ethically.

According to a White House spokesperson, Toomey is engaging in a “baseless smear” campaign.

Senate Banking panel members, who are equally divided between Republicans and Democrats respectively, will vote Tuesday whether to approve Biden’s Fed nominees for consideration in the full Senate. Both parties support most of the nominees, with one exception: Jerome Powell’s renomination as Fed Chair.

Raskin however was the subject of repeated Republican criticism, which centered mainly on her view on climate change’s financial instability risks. Toomey’s open release of the letters he wrote to her about Kansas City Fed President Esther George amplified the criticism.

A former Fed Governor, Raskin personally called George August 2017 to discuss the Reserve Trust’s master accounts application, Toomey said in the letters.

“In the wake of Ms. Raskin’s call, the Kansas City Fed changed its mind and granted Reserve Trust a master account in 2018,” Toomey said.

Gingold claimed that Raskin had merely asked George to confirm the correct information to help him make his decision.

The Kansas City Fed said earlier in the week that its review of Reserve Trust’s request “didnt deviate from normal” and that the initial refusal was based upon a decision that the applicant was not eligible.

The firm later requested a master account. It said that after the fintech firm changed its business model, and Colorado bank regulators had reinterpreted state laws so the Reserve Trust was deemed a depository institution under Colorado law, they were approved.

Raskin replied to Toomey’s queries in writing, stating that she didn’t recall any calls to Reserve Trust and said any communications would have to adhere to all ethics rules.