They will beat you up using mace, batons, boots, brass knuckles and anything else at their disposal. They are the fascist anti fascists. Remember they are cowards, will gang up on you, and only attack in groups. See a lone antifa and they will run screaming.
Daniel has 60+ answers in. Politics. Not only can the new President reverse the executive orders of the previous president, but the current president can reverse his own executive orders, reinstate them, and reverse them again as often as he wants. If Obama wanted, he could reverse his new overtime standards tomorrow, and bring them back the day after.
The President can issue executive orders pursuant to a grant of discretion from Congress, or under the inherent powers that office holds to deal with certain matters of foreign policy.