Earlier this month, a three-judge panel of the D.C. circuit court heard a challenge from the Trump administration to a congressional subpoena, and one of those judges (Trump-appointee Neomi Rao) demanded "evidence" that the House of Representatives "authorized the committee" to subpoena his accounting firm.
The counsel for the House, Douglas Letter, rightly responded that "I don’t think we've ever encountered before an argument that Congress cannot do an oversight investigation of the Executive Branch," and that committees were vested with the power to issue subpoenas. He also pointed out that they had not directly subpoenaed Trump, but his accounting firm. Nonetheless, Letter has advised House leadership that the full House should vote to authorize this and other subpoenas, so that's what the House will do Wednesday.
The legislation from Maryland Democratic Rep. Jamie Raskin would declare that any subpoenas related to Trump, his family, current and former Trump White House officials, and the Trump Organization have the blessing of the full House. "Whereas the validity of some of these investigations has been incorrectly challenged in Federal court on the ground that the investigations and subpoenas were not authorized by the full House," the resolution says "… Resolved, That the House of Representatives ratifies and affirms all current and future investigations, as well as all subpoenas previously issued or to be issued in the future."
That will put a very fine point on Letter's response to Rao in the hearing: that this was the House's business that the courts don't get to interfere in. "Only the House gets to decide" on conducting its investigations, he said. "That's not a subject for the courts.[…] That is outside your lane completely." This resolution will make that crystal clear.