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But on Friday, Mr. Miller suggested the House committee his agency would implement all of the recommendations.

“There’s no air between us on the recommendations,” he said.

The scandal broke open May 10, when Lois Lerner, who heads the IRS division that oversees tax-exempt groups, admitted organizations were singled out if they had “tea party” or “patriot” in their titles. In one more revelation from the hearing, Mr. Miller acknowledged that a question had been planted at an unrelated American Bar Association seminar last Friday to allow Ms. Lerner to “break” the news just days before the IG report was released.

In some cases, Ms. Lerner acknowledged. groups were asked for their lists of donors, which usually violates IRS policy. Attorney General Eric H. Holder said he launched an investigation the same day.

The Senate Finance Committee on Tuesday will hold the next hearing on the scandal. A witness list wasn’t released as of Friday.

The following day the House Oversight and Government Reform Committee will conduct a hearing on the scandal, with Mr. George, Ms. Lerner, former IRS Commissioner Shulman and Treasury Deputy Secretary Neal S. Wolin all scheduled to testify.