A Wisconsin teenager charged in the February deaths of his parents faces wider allegations that he killed them to "obtain the financial means" to assassinate President Trump and cause a governmental collapse, according to a recently unsealed federal warrant. Nikita Casap, 17, was charged last month by Waukesha County authorities with first-degree murder, theft, and other crimes in the deaths of his mother, Tatiana Casap, and his stepfather, Donald Mayer. Casap, in custody at the Waukesha County jail on a $1 million bond since his arrest last month, is due in court next month to enter a plea. County prosecutors...