A CIA employee who lodged a whistleblower complaint over President Trump's request that Ukraine investigate former Vice President Joe Biden has a "professional relationship with one of the 2020 candidates," according to the Washington Examiner's Byron York - citing a source familiar with last Friday's impeachment inquiry interview with Inspector General Michael Atkinson. 

Now we know why House Intelligence Committee Chairman Adam Schiff (D-CA) won't release the transcript...

"The IG said [the whistleblower] worked or had some type of professional relationship with one of the Democratic candidates," said York's source. 

"What [Atkinson] said was that the whistleblower self-disclosed that he was a registered Democrat and that he had a prior working relationship with a current 2020 Democratic presidential candidate," said a third person with knowledge of the testimony. 

All three sources said Atkinson did not identify the Democratic candidate with whom the whistleblower had a connection. It is unclear what the working or professional relationship between the two was.