NEW: DHS Secretary Markwayne Mullin warns sanctuary cities could start seeing major disruptions to international flights as federal agents are redirected to deal with violent protests that have been targeting law enforcement and ICE facilities: "When we have situations, what's happening in new Jersey right now, when we have to prioritize where we put federal employees because local law enforcement won't help protect their streets.”“We're not going to halt the flights, what we're saying is we jus