In her ruling last month, Judge Beryl A. Howell, chief of the U.S. District Court in Washington, found the House was legally engaged in a judicial process that exempts Congress from grand jury secrecy rules.
The Justice Department, which opposes release of the information, quickly appealed.
The three-judge panel reviewing Howell’s decision next week is made up of judges Thomas B. Griffith, Neomi Rao and Judith W. Rogers.
The exact date for the argument was thrown into flux Thursday night after House lawyers asked the court for a one or two-day delay. The lawyers will be in San Francisco, they told the court, for a different appeals court argument over the president’s border wall spending.
The fast-moving case is one of several clashes between Congress and the Trump administration over access to documents and witnesses related to the House investigation of the president.
The Judiciary Committee went to court in July seeking an order for the release of redacted portions of Mueller’s 448-page final report on the investigation into Russian interference in the 2016 presidential election, as well as grand jury materials cited or referenced by the report.
In her 75-page opinion, Howell said the committee and the House, in determining whether to recommend articles of impeachment, are serving like a grand jury.
“In carrying out the weighty constitutional duty of determining whether impeachment of the president is warranted, Congress need not redo the nearly two years of effort spent on the special counsel’s investigation, nor risk being misled by witnesses who may have provided information to the grand jury and the special counsel that varies from what they tell” the House, Howell wrote.