DONALD Trump urged the leader of Ukraine to investigate the son of his democrat rival Joe Biden, according to bombshell reports last night.
In a potential breach of office, the US President is said to have asked his Kiev counterpart EIGHT times to probe Hunter Biden's activities.
It is unclear what allegations may have been levelled against 49-year-old Hunter - who had worked for a Ukrainian gas company.
The shocking revelations - first reported by the - prompted a furious response from the former Vice President.
Democrat 2020 frontrunner Joe, 76, said in a scathing statement on Friday that if the reports are true, "then there is truly no bottom to President Trump's willingness to abuse his power and abase our country."
He added that Trump should release the transcript of his July phone conversation with President Volodymyr Zelenskiy "so that the American people can judge for themselves."
The worrying claims are now at the heart of an explosive - but still confidential - whistleblower complaint against Trump.
'SIGNIFICANT' WHISTLEBLOWER CLAIMS
An anonymous intelligence official raised concerns on August 12 to the government's intelligence inspector general.
Those claims - described as "serious" and "urgent" - involve the "most significant" responsibilities of intelligence leadership.
But a defiant President Trump dismissed the allegations on Friday as originating from a "partisan whistleblower."
Trump insisted the unspecified allegations as "nothing" and "just another political hack job" - while scolding reporters for asking about it.
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Speaking at the Oval Office, Trump added: "I have conversations with many leaders. It's always appropriate. Always appropriate.
"At the highest level always appropriate. And anything I do, I fight for this country."
Democrats are calling for access to further details of the whistleblower's complaints amid allegations of a White House cover-up.
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