At the time, Mowers was working on then-New Jersey Gov. Chris Christie’s presidential campaign. Mowers later served as a senior adviser to Trump before moving to the State Department. As the statute of limitations has passed, there is little chance Mowers could face prosecution over the potential violation. Still, legal experts say his actions could violate federal law. “What he has done is cast a vote in two different states for the election of a president, which on the face of it, looks like he’s violated federal law,” David Schlutz, professor at the University of Minnesota Law School, told the...