Hunter Biden was indicted on nine tax charges Thursday, in a case that adds a new layer of legal peril for President Biden’s son as he faces continued congressional scrutiny and a separate prosecution on felony gun charges.

The indictment from a grand jury seated in Los Angeles sets up another case with the potential for a trial coinciding with the president’s re-election campaign.

The charges come as House Republicans threatened to hold the younger Biden in contempt in a standoff over whether he will submit to closed-door questioning next week as part of an inquiry that has centered on his foreign business dealings. 

The indictment includes three felony charges and six misdemeanor tax offenses, adding new allegations to those included in a plea deal Hunter Biden reached with federal prosecutors earlier this year that later fell apart.

In the 56-page indictment, prosecutors from special counsel David Weiss’s office said the younger Biden chose over a four-year period not to pay at least $1.4 million in federal taxes he owed for the years 2016—the final full year of Joe Biden’s vice presidency—through 2019. Prosecutors said Hunter Biden also evaded taxes for 2018 by filing false or fraudulent returns.