Former Vice President Joe Biden snapped at a reporter who asked about his son Hunter's work in Ukraine being a potential conflict of interest, saying he would "not respond" to the question.

“It’s not a conflict of interest. There’s been no indication of any conflict of interest,” Biden said at a Service Employees International Union forum in Los Angeles on Friday.

The reporter then asked if his son's employment by a Ukrainian gas company while he was still vice president presented the appearance of a conflict of interest, but the 2020 front-runner shifted towards attacking President Trump.

"I’m not going to respond to that," he said. "Focus on this man. What he’s doing that no president has ever done. No president."



WATCH: @JoeBiden says there was no conflict of interest for his role as head of US policy in Ukraine & his son's job in Ukraine. He tells me, "Focus on this man and what he is doing." @CBSNews pic.twitter.com/NcJe0qsjlH — Bo Erickson (@BoKnowsNews) October 4, 2019



At the same event, Biden called Trump "unhinged" and the "most corrupt president we've had in modern history."

"He’s indicted himself by his own statements," he said of the president. "This is not about me. It’s not about my son. There's not a shred of evidence there's been anything done that was wrong."

Biden is facing renewed speculation over his son's work in Ukraine after Trump asked the country's leader to investigate the Bidens for corruption, which sparked a whistleblower complaint and an impeachment inquiry.

While vice president, Biden threatened to withhold $1 billion in U.S. loan guarantees from Ukraine if the nation did not fire its top prosecutor, who was investigating the company for which Hunter Biden was a board member. However, there has been no evidence of wrongdoing by either Biden.