Testy Marco Rubio snaps at reporters as he's confronted with Kimberly Guilfoyle probe first exposed by Daily Mail

A touchy Secretary of State snapped at reporters following a Daily Mail exclusive report revealing a State Department Office of Inspector General investigation into US Ambassador to Greece Kimberly Guilfoyle.

The Trump administration is facing mounting pressure following the revelation of the probe, in addition to Wall Street Journal reporting on leaked texts detailing a $100,000 payoff request for an Amex bill.

Confronted on a foreign tarmac, a visibly irritated Marco Rubio immediately shut down press attempts to push him for real-time reactions to the flood of stories.

'I'm not playing this game with you,' Rubio fired back. 'I don't even know what's true or not true.'

He pushed back sharply, saying, 'You guys somehow walk around thinking that because some source told you something and you reported it, it's the gospel. It's not the gospel. It's not the gospel for me.'

When reporters continued to press him on the foreign diplomatic tour, Rubio expanded on his frustration.

'I know the game,' Rubio said, claiming that the line of questioning is 'not the way this process works.'

'Our job is not to respond every time someone decides to give the media something without any advance warning, without having any chance to look at it and see what's in there. So I'm not going to comment on a story that literally posted a few hours ago,' he added.

A touchy Secretary of State snapped at reporters after being thrust into the lion's den abroad, forced to field a wave of negative global headlines following a Daily Mail exclusive report revealing a State Department Office of Inspector General (OIG) investigation into US Ambassador to Greece Kimberly Guilfoyle

Rubio, flanked by Guilfoyle, arrives to board a plane at Eleftherios Venizelos International Airport near Athens, on his way to Portugal

Guilfoyle seen wrapping her arms around Marco Rubio on the tarmac on Tuesday, alongside Greek Foreign Minister George Gerapetritis and Greek Ambassador Antonis Alexandridis

Meanwhile, back in Washington, Vice President JD Vance faced a similar line of questioning, pressed by CBS News Senior White House reporter Jennifer Jacobs regarding allegations of a US ambassador asking for personal debt payoffs in exchange for government access.

'Obviously I don't love that,' Vance admitted.

Vance took a cautious tone, declining to confirm details before a full review of the facts.

'What I find with these stories is that you never want to comment in a purely abstract way because a lot of times the details really matter, and the details and the context inform the reality of the situation,' Vance noted. 'So of course, I don't like anybody selling access to another government official, certainly a high-level government official.'

Vance also told reporters that 'context matters' in this case.

'I'd like to get the full story before offering a real opinion. A good lesson for a politician is never speak about something you don't have the full facts,' Vance concluded. 

Five sources confirmed to the Daily Mail that a formal Department of State Office of Inspector General (OIG) probe has been opened into Guilfoyle, 57, and her US embassy in Athens.

Three sources say the IG is looking into allegations surrounding Guilfoyle's potential substance abuse, use of private planes and helicopters, close relationship with an energy and construction company, improper gift acceptance and more.

The probe follows extensive reporting by the Daily Mail into Guilfoyle's lavish lifestyle, detailing high-flying luxury travel, parties with Greek billionaires and pop stars, private photographer, champagne demands, an unpaid dining bill, home additions and close ties to energy lobbyist Christos Marafatsos.

The official IG probe was launched after internal complaints within the US Embassy escalated to a breaking point, sources in Greece tell the Daily Mail.

Guilfoyle's lawyer Jesse Binnall declined to comment on the probe when asked prior, telling the Daily Mail that the ambassador won't comment on 'internal matters' as a 'standard policy.'

'Any implication of wrongdoing by the Ambassador is unsupported,' he added and referred the Daily Mail to the State Department OIG.