Daniel Horowitz discusses §1182(f) and the case law surrounding it here. His main points are:
1. The criteria for exclusion [are] not based on “national security concerns” or “terrorism.” It’s anything that, in the determination of the president, would be “detrimental to the interests of the United States.” That includes public welfare, health concerns, values, attitudes, etc. Thus, in this case, where the surge has already created the worst drug and gang crisis in the history of the country, the president would be justified in invoking this power.
2. Just like the president has the authority to completely shut off immigration, he may impose any restrictions on entry even if he chooses to continue various forms of immigration. Thus, in order to abide by the Geneva Conventions on asylum, the president can condition any asylum claims on applying at a U.S. consulate in Mexico, not at the border – or turn them back immediately.
3. This is not the type of provision in which a court can demand evidence that the condition of “detrimental to the interests of the United States” was met. The delegation of authority was designed as plenary power. The courts have absolutely no authority to second-guess the president’s determination. That is up to Congress and the electorate. As a recent Congressional Research Service report observes, from the House report on the 1952 immigration bill that granted this authority: “The bill vests in the President the authority to suspend the entry of all aliens if he finds that their entry would be detrimental to the interests of the United States, for such period as he shall deem necessary” (H.R.RPT.1365, 82d Cong.,2d Sess., at 53 (Feb. 14, 1952)).
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