Any extradition of Andrew and Tristan Tate from the U.S. to the United Kingdom would ultimately rest with the State Department. But that's only after a judge determines whether the request fits the law and a treaty between the countries. The U.S. has a treaty that allows it to honor a U.K. extradition request if the alleged conduct would also be considered illegal in the U.S. The Tate brothers are accused of rape, assault, trafficking and other offenses in England. An expert says it's “very hard” to defeat extradition.