I may have only gone to John J. McCoy School of Law, but I do know that the president cannot change the Constitution by executive order. Specifically, he cannot override the 14th Amendment and end birthright citizenship. That requires amending the Constitution (see the 18th and 21st, respectively), and that requires passage in the Senate and ratification by the states. See, I did pay attention in Grade 10 social studies. Apparently Trump did not.
Aside from the fact that he can’t, and just for the sake of bullshit argument if he could, what’s to stop him or any other president from suspending any other amendment such as the 1st? (Try it with the 2nd and see how that goes over with the MAGA crowd.)
This is just bait for the base and further proof he’s just playing them.