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.