President Biden made a surprise visit to the home of Hallie Biden late Sunday, days before she is scheduled to testify as a critical witness for the prosecution in Hunter Biden’s federal gun trial, which starts next week.

Mr. Biden visited Hallie Biden’s Delaware home around 8 p.m. for a brief chat, ahead of Hunter Biden’s gun trial, which begins June 3 in Wilmington, Delaware. The White House did not provide any details about the visit.

Hallie Biden is the widow of Beau Biden, who died in 2015. She was dating Hunter Biden at the time of his alleged gun crime.

Hunter Biden has pleaded not guilty to three federal charges of purchasing a gun while using illegal narcotics, including allegations of falsely submitting a form saying he was not using drugs when he bought a revolver in 2018.

Prosecutors say Hunter Biden illegally possessed the weapon, which Hallie Biden disposed of in a public dumpster in 2018.

Hallie Biden has been described as “witness 3” in court documents and identified as being “in a romantic relationship with the defendant in October 2018” and he “stayed at her home in the fall of 2018” — which coincides with the time that Hunter Biden was living with Hallie Biden.

In addition to Hallie Biden, Hunter Biden’s ex-wife Kathleen Buhle and ex-girlfriend Zoe Kestan will also testify. If convicted, he faces up to 25 years in prison.

The trial is expected to last about two weeks.

In a separate case, Hunter Biden faces federal tax charges. That case is set to go to trial June 20 in California. He has pleaded not guilty to those charges.

• Jeff Mordock can be reached at jmordock@washingtontimes.com.