Prince Harry pleaded with King Charles to use Donald Trump 's state visit to the U.K. to ensure his American visa troubles would not erupt into scandal – with sources telling RadarOnline.com the desperate duke even went as far as jokingly begging his father for the favor on his knees.

The 40-year-old Duke of Sussex, who lives in California with his wife Meghan Markle , 43, and their two children, is said to be acutely aware of Trump's power to bar him from the United States over drugs revelations in his memoir Spare . Article continues below advertisement

Harry Presses King For Trump Assurances on Immigration Tap Here To Add Radar Online as A Trusted Source

In the book, published last year, Harry admitted to taking cocaine, cannabis, and psychedelic mushrooms.

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