INDIANAPOLIS (AP) — U.S. Sen. Joe Donnelly has lost his campaign treasurer after he was one of only two Democrats to vote with Republicans in an unsuccessful effort to strip Planned Parenthood federal funding.

Former Lt. Gov. Kathy Davis said Wednesday that she resigned from the volunteer post because of Donnelly’s vote on the measure Monday that would have cost Planned Parenthood more than $500 million in federal funding it receives each year.

Donnelly campaign finance director Kelly Norton says in a statement that the first-term senator “is deeply appreciative” to Davis for her work.

Donnelly said in a statement that he couldn’t support federal funding for Planned Parenthood until it was clear that all of its clinics are complying with federal and state laws regarding medical use of fetal tissues.