The tease came after his wife shared a photo of him at a podium and tweeted Monday, \"Make California great again.\" He responded by writing, \"Taking back California!\"

He has been floating a potential bid for Congress since he was released from prison, tweeting back in December, \"It is true. I will be running for Congress in 2020, and I will win. Stay tuned.\"

Papadopoulos, who filed as a Republican, will likely face an uphill climb in the battle for Hill's seat, a GOP stronghold that she flipped to blue in the 2018 midterm elections.

The district has been trending blue in recent years. Hill added to Hillary Clinton's six-point edge over Donald Trump in 2016, by winning the district by 9 points last year.

One of the Democrats already declared in the race, California State Assemblywoman Christy Smith, welcomed Papadopoulos to the contest, tweeting a video asking him to locate the district on a map.

Rep. Katie Hill said she would resign from Congress on Sunday after the House Ethics Committee announced an investigation into allegations she had a sexual relationship with one of her congressional staffers in violation of House rules, something she has denied. Hill, who is embroiled in a bitter divorce and has accused her opponents of circulating intimate photos of her -- which she calls \"revenge porn\" -- has admitted to having a relationship with a campaign staffer when she ran for Congress in 2018, which she said she regrets.

“It is with a broken heart that today I announce my resignation from Congress,” Hill said in a statement. “This is the hardest thing I have ever had to do, but I believe it is the best thing for my constituents, my community, and our country.”

ABC's William Mansell contributed to this report

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