Article continues below advertisementPrince William is at the center of fresh royal tensions as plans emerge for a high-profile U.S. tour with his wife Kate Middleton - a visit insiders tell OK! has left Meghan Markle furious and feeling sidelined amid a simmering transatlantic rivalry.The proposed trip, penciled in for 2026, would see William and Kate travel to the United States to mark the 250th anniversary of the signing of the Declaration of Independence, a moment Washington, D.C., is preparing to celebrate on a global scale.