An Arizona state lawmaker revealed Monday that federal authorities subpoenaed him for records related to the 2020 election, marking the second publicly confirmed jurisdiction the Department of Justice is investigating over the matter.

Arizona Senate President Warren Petersen, a Republican, said in a social media post he received the subpoena for material related to the state Senate's 2020 audit last week and complied with it.

"Late last week I received and complied with a federal grand jury subpoena for records relating to the Arizona State Senate’s 2020 audit of Maricopa County," Petersen wrote. "The FBI has the records. Any other report is fake news."

The request represents an expansion of a federal probe tied to 2020 after the DOJ initially targeted Fulton County, Georgia. The development also comes as President Donald Trump has grown increasingly outspoken about election security in the lead-up to the 2026 midterms, renewing his attention on disputes stemming from the last presidential race.

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Petersen made the revelation after President Donald Trump shared a Just the News report about the subpoena on Truth Social, writing, "Great!!! FBI secretly seizes election records from Arizona's largest county as voting probe expands."

Multiple U.S. officials confirmed the election probe to Fox News, saying the DOJ is looking at a large tranche of Arizona data from 2020 and 2024.

The White House directed Fox News Digital to the FBI on Monday when asked for comment. The FBI declined to comment.

Arizona Attorney General Kris Mayes, an elected Democrat, said the new investigation was based on claims that courts and state investigators have proven wrong.

"What the Trump administration appears to be pursuing now is not a legitimate law enforcement inquiry," Mayes said in a statement. "It is the weaponization of federal law enforcement in service of crackpots and lies."

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The subpoena comes as the president increasingly focuses on election security ahead of the 2026 midterms, telling Congress in a social media post on Sunday that he will not sign any legislation into law until it passes the SAVE America Act.

The bill's primary purpose is to require voters nationwide to show physical identification to prove citizenship to vote in federal elections. The version of the bill Trump is pushing would also ban mail-in ballots except for the military and in other extenuating circumstances.

Maricopa, Arizona's most populous county, was a hotbed for accusations of voter fraud in 2020. Fulton County, Georgia, faced similar accusations, with the DOJ launching a separate investigation into the 2020 election earlier this year. 

Trump lost Arizona in 2020 by about 0.3 percentage points. The president refused to concede, and his legal team brought a series of lawsuits alleging vote-counting irregularities, but none were successful.

Fox News' David Spunt and Jake Gibson contributed to this report.

A House lawmaker from deep-blue California is leaving the GOP effective immediately, cutting Republicans' slim margin even thinner, his office confirmed to Fox News Digital on Monday.

Rep. Kevin Kiley, I-Calif., had already announced his intention to run as an Independent candidate in a Democrat-leaning district in the November midterms, but he is now deciding to take on the new political identity early.

"This last week, we registered under no party preference in California," Kiley told local reporters, according to a recording obtained by Fox News Digital. "I'm also today asking the clerk of the U.S. House of Representatives to have that reflected in the official roster…so I will be the sole Independent member of the House of Representatives."

House Republicans are already dealing with a razor-thin majority of just one vote, which is expected to grow to a two-vote margin after a special election in a deep-red Georgia district this week.

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Kiley said he would still caucus with Republicans, however, in order to retain his committee assignments in the House.

"The rules of the House of Representatives essentially force you, as an administrative matter, to caucus with one party or the other, which, by the way, I don't think is a good thing," Kiley said.

"For example, your committee assignments run through the parties, and so it really, you know, forces you to be associated in that administrative sense with one caucus or another in order to function and be able to serve your constituents in the House."

Kiley's decision to run as an Independent comes after his current seat in California's 3rd congressional district was redrawn to lean more heavily toward Democrats. 

California Gov. Gavin Newsom, a potential White House candidate for the 2028 cycle, led the charge in redrawing the maps to more heavily favor Democrats despite the objections of Golden State Republicans. 

It was a direct response to Texas Republicans passing a new congressional map that could give the GOP an edge in as many as five new seats.

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Kiley had introduced legislation to ban mid-decade redistricting when both fights were ongoing and sharply rebuked the effort by both parties. 

He also carved out an independent streak months before formally dropping the GOP, becoming one of the party's most vocal critics of Speaker Mike Johnson, R-La., for both refusing to wade into the redistricting fight and for keeping the House out of session during the entire 43-day government shutdown last year.

Kiley announced in a statement last week that he would now run in California's newly redrawn 6th congressional district, which the nonpartisan Cook Political Report rates a "D+5."

"It’s true that I was fully prepared to run in the new 5th, having tested the waters and with polls showing a favorable outlook in a ‘safe’ district. But doing what’s easy and what’s right are often not the same. And at the end of the day, as much as I love the communities in the 5th district that I represent now — and as excited as I was about the new ones — seeking office in a district that doesn’t include my hometown didn’t feel right," Kiley said.

"The new 6th district is Democratic-leaning but open-minded. While this will be a more challenging race, I believe we can build a winning coalition for common sense. Thanks to all for your encouragement and patience."