Just so you understand that I am totally against anchor babies. I do not think that should be allowed. But executive orders should be limited to internal policies within the administration. And that is how I feel about it. I always have felt that way. When the cross over into to duties of the legislative branch then there is no separation of powers.
I think the premise of your argument is faulty. The 14th Amendment was written by the Legislative branch and confirmed by the people. Therefor the legislative branch has done its job. It is the duty of the Executive branch to ENFORCE the laws the legislative branch passes. We do not need a NEW law as the 14th is quite clear. Somewhere along the line the 14th Amendment has been misinterpreted and used against we the people. The president is simply doing his job, enforcing the law.