Former Vice President Joe Biden has stepped up to explain his heated confrontation with an Iowa man at his rally on Dec. 6 after hurling insults at the elderly voter when he was questioned about his son’s debatable business dealings at a Ukrainian gas company.

As of now, Biden has yet to prove to his voters how he can effectively answer questions about Hunter Biden’s Ukraine dealings without projecting his denial and fury, though he is regretful for lashing out at the 83-year-old man at the rally.

“I probably shouldn’t have challenged him to pushups,” Biden told reporters when he had no choice but to address the confrontation, where he called the elderly man a “damn liar,” “fat,” and “sedentary,” before calling the man “too old” to be voting for him.

But Biden denied that Iowa voters want to discuss Hunter Biden’s overseas dealings, claiming, “No one has [questioned Hunter’s dealings in Ukraine] except that fella.”

He was immediately proven wrong.

Seventy-eight-year-old Cedar Rapids voter Carol Wickey, a Democrat who attended Biden’s rally in her hometown, said that Joe Biden isn’t being straightforward enough.

“He needs to be prepared to answer questions about it. And I don’t think he is. I don’t think he’s come up with an answer,” Wickey said. “Loving his kid to death and not doing anything wrong is not an answer. And I, as someone who thinks he’s a really decent human being, when I first started hearing about the Hunter connection, it bothered me. I wanted an answer because it doesn’t look good. It’s a bad perception.”

“I’m not going to comment on anything other than that my son speaks for himself. He’s a 47-year-old man,” Biden argued to reporters on Dec. 6. “He didn’t do a single thing that was illegal or wrong. He didn’t like the way it appeared.”

The former vice president firmly stood by his argument that Hunter has done nothing wrong, but even Hunter himself had acknowledged his “poor judgment” on taking the paid position at Ukrainian gas company Burisma Holdings.

“In retrospect I think there was poor judgment on my part,” Hunter Biden said during an ABC News interview recorded at his Los Angeles residence on Oct. 15. “I know I did nothing wrong at all, but it was poor judgment to be in the middle of something that is a, it’s a swamp in many ways,” Hunter Biden said.

New York Post’s Jonathan S. Tobin in a Nov. 11 column pointed out precisely why it’s only logical—and legitimate—for President Trump and the American public to have question about Hunter Biden’s dealings in Ukraine.

“Biden’s younger and wayward son was being paid tens of thousands of dollars a month to be on the board of a Ukrainian energy company—despite having exactly zero qualifications for the post other than his last name,” Tobin noted.

“It is also a matter of record that President Barack Obama tasked Joe Biden with managing U.S. relations with Ukraine at the time.” Tobin wrote, citing a report by The New York Times. “We also know, ‘Ukraine’s energy sector—the country’s crucial geopolitical engine—was a central point of contention between the Obama administration and Kyiv.”

Even if the American people were to believe what Democrats are touting about the president, Tobin argued that it is impossible for the House to investigate the matter without taking into consideration President Trump’s motivation for Ukraine to probe the Bidens.

“Hunter needs to be asked how and why he was hired by ­Burisma and what he knew about the firm’s possible links to Russia or Kremlin efforts to pressure the Kyiv government,” Tobin wrote. “Both Bidens need to tell us what they knew about each other’s Ukraine work, and they have to be ready for skeptical questions about their assurances that they kept silent about it to each other.”

Tobin suggested, “Joe Biden needs to explain why his threats to withhold aid to Ukraine, about which he publicly boasted, were legitimate, while Trump’s were somehow an impeachable offense. He should also be asked what should be done to stop others from behaving as corruptly as his son did.”

“Any president has the right to ask questions about American involvement in corrupt acts abroad. That’s true—even if Joe Biden was innocent of wrongdoing and if Hunter is only guilty of being a lame grifter,” Tobin pointed out.