That's not how I read it, but then I'm not an expert on immigration law. They way I see it is that non-citizens who travel to these countries of concern may not be allowed back in.
Travel to-from certain locations has been the case, with quite a lot of terrorists.
San Bernardino. Husband native born citizen, who traveled to Pakistan. Wife admitted with dangerously poor vetting. Together they murder people.
Had Trump or anybody else clamped down on vetting, lives would have been spared.
But God forbid that Trump actually wants to improve vetting, or to save lives. He is just a bad guy, for that as well. /s