A right-wing US "shock jock" has turned to Hillary Clinton in a bid to overturn his ban on entering the UK.
Radio host Michael Savage, real name Michael Weiner, was among 16 people "named and shamed" on a Home Office list of undesirables.
He has since said he will sue for defamation and has now written to the US Secretary of State over the matter.
The letter, sent from the Thomas More Law Centre on his behalf, "demands" that Mrs Clinton tells the UK Government to rescind the "arbitrary and capricious" ban.
Mr Savage's name figured on a list which also included former Ku Klux Klan grand wizard Stephen Donald Black, Hamas MP Unis Al-Astal, Jewish extremist Mike Guzovsky and American anti-gay Baptist pastor Fred Waldron Phelps.
The Home Office described Mr Savage as a "controversial daily radio host considered to be engaging in unacceptable behaviour by seeking to provoke others to serious criminal acts and fostering hatred which might lead to inter-community violence".
His inclusion on the list of those banned from entry prompted Mr Savage to describe Home Secretary Jacqui Smith as a "lunatic".
The radio host's controversial shows often contain anti-gay, anti-Muslim and anti-immigration statements. But until the latest controversy he was virtually unknown in the UK, as the letter to Mrs Clinton notes:
"I doubt that many British citizens ever heard of Mr Savage until after the May 5 ban. It is extremely suspicious that the Home Secretary's office would select an American radio talk show host to place on their so-called 'least wanted list' when that individual has never taken steps to enter their country."
The letter accuses the British Government of including Mr Savage's name "to give political cover to the list that concerns mainly Muslims".