The judge was appointed by the Obama administration and was supposed to throw out the lawsuit.
The royal couple was friendly with Obama, according to the queen's sister.
The judge struck down the claim that she wouldn't be impartial in the case.
An Obama-appointed federal judge was asked to throw out a defamation lawsuit against the royal because of his relationship with Prince Harry.
According to court documents, the judge was appointed by the former president.
The motion states that the Obama family and Prince Harry are supporters of each other.
There were rumors that she had a relationship with the former president that would make it difficult for her to rule fairly.
The judge referred to herself in the decision, saying that the president appointed her 13 years ago. The Obama's have never had a relationship with the undersigned. The former president and the former first lady have not been in touch with the undersigned.
Jamie Alan Sasson said he respects the judge's decision and thinks she will rule fairly.
"We trust the judge will be fair and impartial to our client, however we did feel it was necessary, being an Obama appointees and how close Harry andMeghan are to the Obama family."
In Donald Trump's lawsuit against Hillary Clinton, he tried to get the judge disqualified because he was appointed by Bill Clinton, but that motion was denied.
The Dutchess is being sued for defamation over comments she made during her interview with Oprah Winfrey.
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