Some Republicans in Congress, including Sen. Rob Portman of Ohio, are donating their contributions from Las Vegas billionaire Steve Wynn to charity in light of sexual misconduct allegations against the former Republican National Committee finance chairman.

The announcements come in light of a Wall Street Journal report Friday that Wynn, a casino mogul and prolific Republican donor, sexually harassed several women. Wynn, chairman and CEO of Wynn Resorts, has denied the allegations.

Wynn’s home-state senator Dean Heller, who is running for re-election this year, is donating the $5,400 his campaign received last year from the casino mogul to a yet-determined charity, campaign aides said Monday. A spokeswoman for Portman said the Ohio Republican would donate the $5,400 his campaign received from Wynn for his 2016 campaign to charities aimed at stemming human sex-trafficking. Likewise, an aide to Wisconsin Sen. Ron Johnson said he was giving the $5,400 he got in 2016 from Wynn to a domestic abuse victims service in Oshkosh, Wis.

The Republican Governors Association, the chief campaign fundraising group for GOP governor candidates, was returning $100,000 from Wynn’s company. It also canceled a contract to hold its 2020 annual convention at the Wynn Las Vegas resort, and said it will not accept contributions from Wynn or his company unless the claims against him are proved false.

Aides to House Speaker Paul Ryan confirmed he would donate $1,000 from a Wynn-related business group to a Wisconsin homelessness charity. Rep. Karen Handel of Georgia, who won a special election last year, was giving the $2,700 her campaign received from Wynn to a Georgia charity for sexual and domestic abuse victims.

The announcements by Heller, Portman and Johnson follow calls Sunday by Republican Sens. Susan Collins of Maine and Lindsey Graham of South Carolina to return the money.

RNC Chairwoman Ronna Romney McDaniel told committee members Saturday she had accepted Wynn’s resignation as finance committee chairman. The committee convenes in Washington this week for its annual winter meeting.

Heller and Portman and are part of a long list of mainly Republican lawmakers, candidates and party organizations Wynn has contributed to in recent years.