A member of the right-wing paramilitary group the Oath Keepers in the days leading up to the Jan. 6 Capitol riot proposed a plan to transport “heavy weapons” in a boat across the Potomac River, prosecutors said in a Thursday court filing. Federal prosecutors made the allegation in a memo opposing a motion for release from the attorneys of Thomas Edward Caldwell, who along with fellow Oath Keeper members Jessica Marie Watkins and Donovan Crowl faces conspiracy charges in connection with alleged plans to lead a coup ahead of the deadly pro-Trump mob attack. Days before the attack, prosecutors in...