Law enforcement officials reportedly informed the Associated Press on Sunday of an arrest related to the ricin poison sent to the White House. An as-yet-unidentified woman was arrested at the Canada border on Sunday, three law enforcement officials told the Associated Press. The woman is suspected to be the sender of a letter intercepted on its way to the White House containing the deadly poison, ricin. The letter was addressed to President Donald Trump. The woman was reportedly arrested by U.S. Customs and Border Protection officers at the Peace Bridge border crossing near Buffalo. The letter itself is believed to...