Photo: George Rose/Getty Images

Twenty-three states joined California in suing the Environmental Protection Agency for stripping away an Obama-era waiver that allows the state to set strict emissions standards on cars and trucks, the California's attorney general's office announced Friday.

The big picture: This is the latest in a high-stakes battle between California and the Trump administration over the fuel-efficiency of cars in America, says Axios' Amy Harder. Automakers — and drivers — are caught in the middle and likely stuck with significant uncertainty for years as these legal and regulatory fights wear on.

  • One of the standards at the center of the latest lawsuit requires the sale of an increasing number of electric or other zero-emission vehicles.
  • Another addresses standards for tailpipe emissions. California has stricter qualifications than the EPA requires nationally.

Between the lines, via Axios Amy Harder: If you're losing track of all the lawsuits, you're probably not alone. This lawsuit is separate from another suit filed in September, also by California and a similar set of states,

  • That suit was filed against the National Highway Traffic Safety Administration"to undo a parallel determination that federal law bars California from setting tailpipe emission standards," Reuters writes.

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Trump refuses to answer question on whether he supports QAnon conspiracy theory

President Trump on Friday refused to answer a direct question on whether or not he supports the QAnon conspiracy theory during a press briefing.

Why it matters: Trump congratulated Georgia Republican Marjorie Taylor Greene, who vocally supports the conspiracy theory, on her victory in a House primary runoff earlier this week — illustrating how the once-fringe conspiracy theory has gained ground within his party.

Postal workers' union endorses Biden

Photo: Drew Angerer/Getty Images

The National Association of Letter Carriers, the union representing roughly 300,000 current and former postal workers, on Friday endorsed Joe Biden in the 2020 presidential election, calling him "a fierce ally and defender of the U.S. Postal Service," reports NBC News.

Why it matters: The endorsement comes as President Trump has vowed to block additional funding for the USPS in the next coronavirus stimulus package, linking it to his continued baseless claims that increased mail-in voting will lead to widespread voter fraud.

Lawmakers demand answers from World Bank on Xinjiang loan

Illustration: Sarah Grillo/Axios

U.S. lawmakers are demanding answers from the World Bank about its continued operation of a $50 million loan program in Xinjiang, following Axios reporting on the loans.

Why it matters: The Chinese government is currently waging a campaign of cultural and demographic genocide against ethnic minorities in Xinjiang, in northwest China. The lawmakers contend that the recipients of the loans may be complicit in that repression.