Hunter Biden sued the Internal Revenue Service on Monday, claiming that two agents publicly alleging tax-probe interference wrongly shared his personal information, a case that comes amid escalating legal and political struggles as the 2024 election looms.

The agents “targeted and sought to embarrass Mr. Biden” with the sharing of confidential tax information in press interviews and testimony before Congress, the suit said. His lawyers argue that whistleblower protections don’t apply, but a lawyer for one agent said any confidential information released came under whistleblower authorization and called the suit a “frivolous smear.”

The lawsuit marks the latest legal pushback from Biden as a long-running federal investigation into him unfolds against a sharply political backdrop. That includes an impeachment inquiry aimed at his father, President Joe Biden, seeking to tie him to his son’s business dealings.

“Mr. Biden is the son of the President of the United States. He has all the same responsibilities as any other American citizen, and the IRS can and should make certain that he abides by those responsibilities,” the suit states. “Similarly, Mr. Biden has no fewer or lesser rights than any other American citizen, and no government agency or government agent” has free rein to violate his rights simply because of who he is.

The suit says the IRS hasn’t done enough to halt the airing of his personal information. It seeks to “force compliance with federal tax and privacy laws” and damages of $1,000 for every unauthorized disclosure.

IRS supervisory special agent Greg Shapley, and a second agent, Joe Ziegler, have claimed there was a pattern of “slow-walking investigative steps” into Hunter Biden in testimony before Congress. They alleged that the prosecutor overseeing the investigation, Delaware U.S. Attorney David Weiss, didn’t have full authority to bring charges in other jurisdictions. Weiss and the Justice Department have denied that.

Shapley’s lawyer called the lawsuit a “frivolous smear” that sought to “intimidate any current and future whistleblowers.” He didn’t release confidential tax information except through legal whistleblower disclosures, his attorney said. “Once Congress released that testimony, like every American citizen, he has a right to discuss that public information.”