May 18 (UPI) -- House Republican Leader Kevin McCarthy said Tuesday he opposes an independent 9/11-style commission to study the deadly Jan. 6 attack at the U.S. Capitol -- a position that drew a scathing response from House Speaker Nancy Pelosi.
House homeland security committee Chair Rep. Bennie Thompson, D-Miss., reached an agreement last week with ranking Republican Rep. John Katko of New York to introduce legislation creating the commission.
The Capitol attack killed multiple people, including a Capitol Police officer, and injured 140 other officers. Former President Donald Trump was impeached for inciting the attack to overturn his electoral defeat and most Republicans have been criticized for downplaying the assault.
The legislation proposes an even number of Democrats and Republicans on the investigative panel, but McCarthy on Tuesday accused Pelosi of failing to "negotiate in good faith."
In a statement announcing his opposition, McCarthy notes that the Justice Department and other federal offices are already investigating the Capitol attack.
McCarthy also said any such commission should look at other violence beyond January 6, including the 2017 shooting at a Republican congressional baseball practice.
The House is scheduled to vote on the commission proposal on Wednesday. The panel would include 10 members and issue a full report by the end of the year.
Some lawmakers have suggested McCarthy could be subpoenaed before the commission since he spoke with Trump during the riot.
Pelosi on Tuesday slammed McCarthy's opposition to the investigative panel.
"I'm very pleased that we have a bipartisan bill to come to the floor," she said, according to The Hill.
"And [it's] disappointing but not surprising that the cowardice on the part of some on the Republican side not to want to find the truth."
The White House voiced official support for the commission on Tuesday.
"[It] was an unprecedented assault on our democracy, an effort to undo the will of the American people and threaten the peaceful transition of power," the Office of Management and Budget tweeted.