The documents House Ways and Means Committee members plan to review in a closed session July 25 could help Democrats with legal arguments in their quest for President Donald Trump’s tax returns, a House aide said.

The meeting, announced July 23, will focus on historical documents tied to tax code Section 6103, the provision that gives Ways and Means Chairman Richard Neal (D-Mass.) the authority to seek Trump’s personal and business tax returns. The panel will move into an executive session to discuss documents that have private taxpayer information, another aide said.

When asked, Neal said the documents aren’t Trump’s actual tax returns. The administration has refused requests and a subpoena for the returns, leading to the committee’s lawsuit earlier this month.

Ranking member Kevin Brady (R-Texas) said he doesn’t know what the meeting will be about, and he hasn’t been allowed to see the documents.

“If this effort has a legitimate legislative purpose, and so far it doesn’t, this is not how you handle it, in my view,” Brady said.

Trump sued the committee and New York State Attorney General Letitia James on July 23 in an effort to prevent House lawmakers from getting his state tax returns under a new law.

—With assistance from Kelly Zegers.