Mostly the answer is no. Currently 31 emergencies on the book. As per the Emergencies Act of 1976 Congress gave itself the power to convene every 6 months to re-up the emergency or to terminate it. However, it has never done so.... There are way too many N.E.'s declared, but my guess is that Trump is turning them against the deep state. He's using the powers they gave the executive against them.