Democratic presidential candidate Joe Biden on Monday said nobody wants their children to grow up like President Donald Trump.

As his son Hunter Biden faces allegations of drug abuse, soliciting prostitutes, and participating in an influence peddling scheme at a Ukrainian gas company, the former vice president assailed Trump's character while speaking at a New York City fundraiser.

"The American people, including the senators who are going to vote to acquit him, know no one wants their kid to grow up like him," Biden said.

"No psychiatrist or anyone in the association can talk about the fact that this president has a serious problem," Biden said. "Narcissism is a mental deficiency. And it means you cannot tolerate any criticism at all…. Whether he's a narcissist or not, some people think he's a narcissist."

Biden has repeatedly defended his son's business dealings, saying Hunter "did nothing wrong." When asked about his 49-year-old son, Biden has said the attention should be on Trump's phone call with Ukrainian president Volodymyr Zelensky.

Democrats have alleged the transcript of the phone call shows Trump demanding Zelensky open an investigation into Hunter Biden in exchange for military aid to Ukraine. The White House has denied there was any quid pro quo. The aid was given without Ukraine announcing an investigation.

The elder Biden has struggled to respond to the range of personal issues his son has faced. When a paternity test showed, despite Hunter's strenuous denials, that the younger Biden fathered a child with an Arkansas woman, the former vice president blasted a reporter for asking about it.