President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE plans to appoint two more members to his Presidential Advisory Commission on Election Integrity, the White House announced Monday evening.

Christian Adams of Virginia and Alan Lamar King of Alabama will join the 15-member commission that Trump created by executive order in May to investigate his claims of voter fraud in last year’s presidential election.

The group is expected to hold its first public meeting on July 19, according to a notice published in the Federal Register last week.

Adams worked at the Department of Justice in the George W. Bush administration and wrote a book, titled "Injustice: Exposing the Racial Agenda of the Obama Justice Department," and has previously claimed that immigrants in the country illegally registered to vote. He is a columnist for the conservative site PJ Media.

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King is a probate judge in Alabama.

The commission asked all 50 states and the District of Columbia last week for extensive information on their registered voters, including full names and addresses, political party registration and the last four digits of their Social Security numbers.

As many as 44 states and the District have refused to turn over the documents, and regulatory experts told The Hill that they believed the commission may have violated the law by not first running its request through a federal office that handles information requests for the government.

The administration argues the commission is not covered by those rules.

Kris Kobach, Kansas's Republican secretary of state who heads Trump’s election commission, says only 14 states and the District have so far refused the commission's request.