The House of Representatives voted Wednesday to set up an expert commission to investigate the Jan. 6 riot at the Capitol. But a majority of Republicans voted against the commission part of a broader effort from the party to distance itself from an attack encouraged by its own leader, then-President Donald Trump.

The bipartisan vote sets up a showdown with the Senate, where Republicans led by Sen. Mitch McConnell (R-Ky.) may filibuster the bill because the investigation would probably not look great for the Republican Party.

The bill would establish a National Commission to Investigate the January 6 Attack on the United States Capitol Complex , with five members appointed by Republicans, five by Democrats, and a final report due to the White House and Congress by the end of the year.

The panels appointees would have to come from outside of government and have national recognition and significant depth of experience in fields like public service, law enforcement, technology and counterterrorism.

The bill was written by House Homeland Security Committee Chair Bennie Thompson (D-Miss.) and the committees top Republican, Rep. John Katko (R-N.Y.).

Some things about the riot are already well-known, such as the fact that Trump incited the violence by lying for months that the 2020 election had been stolen from him. Many Republican lawmakers repeated the lies, and most voted against certifying on election results even after the mob attack on Jan. 6.

But Republicans have sought to rewrite history. House Republican Leader Kevin McCarthy (R-Calif.) has said the president didnt provoke the attack. Other Republicans have suggested the mob consisted of fake Trump supporters or that the violent storming of the Capitol wasnt so bad.

Both McCarthy and McConnell have said the commission ought to examine riots connected to the Black Lives Matter movement in 2020, as though protests against police brutality had something to do with an insurrection against valid election results. The text of the bill would already task the commission with examining the influencing factors that fomented the attack, which could include Black Lives Matter if the panels experts think it is relevant. Republicans dont think thats good enough.

Trump, too, has insisted the commission is a sham because it does not deal with unrelated matters.

It is just more partisan unfairness and unless the murders, riots, and fire bombings in Portland, Minneapolis, Seattle, Chicago, and New York are also going to be studied, this discussion should be ended immediately, Trump said in a statement on Tuesday.

Even though Republicans opposed the bill, relatively few actually spoke out against it on the House floor. One who did was Rep. Marjorie Taylor Greene (R-Ga.), a Trump ally who was previously stripped of committee assignments for extremist and hateful speech and was recently in the news for harassing Rep. Alexandria Ocasio-Cortez (D-N.Y.). Greene argued that the commission was unnecessary.

The media is going to use this to smear Trump supporters and President Trump for the next few years and cover up the damage the real damage thats happening to the people of this country, Greene said on the House floor.

Thompson said it was a big shock to him and others when McCarthy announced his opposition to the bill this week. He told reporters that McCarthy had been engaged in the bills development from the start and was supportive of it behind the scenes.

There was no issue on his part, Thompson said. But, I guess thats politics.