In making his claims about Hunter Biden, Trump cited the findings of a controversial, highly politicized investigation by Senate Republicans into the Bidens, which was published just weeks before the 2020 election and produced little new evidence of wrongdoing.

Trump has promoted dubious claims of foreign business dealings by Hunter Biden, including that he received millions of dollars from the wife of the late mayor of Moscow.

She gave him $3.5 million and I think Putin knows the answer to that. I think he should release it, Trump said in the interview.

According to POLITICO, Trump sought to do business with Luzhkov's government in the late 1990s. A proposed Trump Tower Moscow was one of the real estate deals that Trump pursued in Russia.

The White House wouldn't comment on Trump's remarks. Attorneys for Hunter Biden didn't return a request for comment.

The U.S. Attorney's Office in Delaware was investigating Hunter Biden's tax affairs. The securities fraud unit in the Southern District of New York looked at his finances.

The Wall Street Journal reported on Monday that the federal tax investigation into Hunter Biden is gaining steam, with prosecutors in Delaware seeking information and grand jury testimony in recent weeks.

Trump's new interview isn't the first time the former president has suggested that foreign governments intervene to hurt his domestic political rivals.

The Russian government was asked by Trump to get and release emails from the private email server that Hillary Clinton used during her time as Secretary of State.

Trump was impeached by the House of Representatives for allegedly withholding military aid from Ukraine unless President Volodymyr Zelenskyy announced investigations against the Bidens and other Democrats.

The new request of Putin by Trump raises the specter of the scandals, as the Russian president continues with his war in Ukraine.

The invasion of Ukraine by Putin was described by Trump as a genius and a savvy one.