[wan23]

There may not be a fundamental right, but there are some very practical reasons to allow permanent residents and people who already hold valid visas to enter the country. Those documents are very difficult to obtain, often requiring sponsorship by an American corporation that would presumably be hurt by having their workers turned away at the border with no warning. Further these documents represent promises made by the American people to these individuals, who enter into leases, buy property, open gym memberships and generally build lives in the United States because they had been previously granted permission to stay for a time. What does it say about us that a change in leadership might suddenly invalidate promises previously made by the government for no apparent reason? Given such uncertainty why should anyone invest anything into this country?