The chief executive of the liberal fund-raising platform ActBlue has agreed to House Republicans’ request for her testimony next month to answer questions about how the group vets overseas donors, according to Walt Smoloski, a spokesman for the House Administration Committee.

Regina Wallace-Jones, the ActBlue chief executive, is expected to appear before the committee on June 10. She has not spoken about ActBlue’s vetting process, in interviews or in public, since The New York Times revealed in April that her group’s own lawyers warned that she may have misled House Republican investigators in her previous responses to their questions.

After the Times article about the correspondence between ActBlue and its lawyers, the House Administration Committee asked Ms. Wallace-Jones to answer questions in person. ActBlue and the committee have exchanged formal letters about ActBlue’s vetting processes since the House committee, which is led by Representative Bryan Steil, a Wisconsin Republican, began investigating the platform in 2023.

“Ms. Wallace-Jones allegedly misled our committee at the outset of our investigation into ActBlue’s fraud prevention standards,” Mr. Steil said. “It’s past time we set the record straight and got answers for the American people. I look forward to hearing her testify.”

ActBlue’s lawyer has maintained that the organization has not misled the committee.

President Trump and congressional Republicans have long pushed for an investigation into ActBlue in an apparent effort to undermine the Democratic Party’s largest fund-raising vehicle, which supports candidates up and down the ballot.

Ms. Wallace-Jones and ActBlue have said that she has done nothing wrong and that Republican attacks on her group are politically motivated.

ActBlue’s lawyer, Vincent Cohen, last month dismissed the House Republicans’ investigation and proposed that they “reconsider their current approach” to the organization. In the letter, he said ActBlue had stopped processing contributions from American citizens abroad, rendering questions about such future vetting moot.

ActBlue has become ensnared in a separate legal battle with Ken Paxton, the Texas attorney general, who is in a heated Republican primary runoff contest against Senator John Cornyn.

Mr. Paxton and ActBlue have in recent weeks filed lawsuits against each other, with Mr. Paxton saying ActBlue violated the Deceptive Trade Practices Act by processing improper contributions. ActBlue countersued Mr. Paxton, arguing that he began a politically motivated investigation after a fund-raising surge for James Talarico, the Democratic nominee for the Texas Senate seat.