At a House Oversight hearing on Tuesday, the matter at hand was emissions rules.
Yet the hearing got off to a rocky start as tensions flared over a separate matter - the impeachment probe.
(SOUNDBITE) (ENGLISH) ALEXANDRIA OCASIO CORTEZ AND REPUBLICAN COLLEAGUE: "Do we have a reason for why this hearing is trying to be adjourned?" (FLASH) "We are running an impeachment hearing down in the basement of the Capitol." After the dust settled, former California Governor Jerry Brown started off the hearing weighing in on the effects of President Trump's rollback of Obama-era fuel efficiency standards.
And slamming General Motors for siding with the Trump administration in the legal battle over whether California can set its own emissions rules.
(SOUNDBITE) (ENGLISH) FORMER CALIFORNIA GOVERNOR JERRY BROWN SAYING: "It's really something when at the moment California's burning, General Motors jumps on the bandwagon as Trump's lapdog - joining the opposition to undercut California's rules." GM and other automakers made the announcement in a joint filing Monday, breaking with other major automakers including Ford Motor and Honda, which had reached a voluntary deal with California on emissions rules over the summer.
GM's move caused Brown to deviate from his prepared testimony to lambast the company and to point out the raging wildfires spreading across California.
(SOUNDBITE) (ENGLISH) FORMER CALIFORNIA GOVERNOR JERRY BROWN SAYING: "Hundreds of thousands of people have been evacuated.
There's real terror…California's burning while the deniers make a joke out of the standards that protect us all." Brown, who recently created a climate change partnership with Chinese officials at the University of California, said the United States will fall behind China and the EU on the deployment of electric vehicles.
Telling lawmakers that the combustion car is going the way of the dodo bird and to get with it or get out of the way.