Read my posts more closely, Darkballs. Follows the links, read the authorities. The POTUS has
peremptory authority to decide what constitutes an invasion, insurrection, rebellion, or national emergency. We don't need to debate whether it's Constitutional under the war powers or whether POTUS has emergency powers (like
@waiguoren is apparently attempting, God bless him), because Congress has
expressly delegated that authority to the POTUS through various acts which I've listed above. The President exercises wide discretion in determining the existence of these perils, and what action(s) to take in response. For that reason, it doesn't matter whether you or waiguoren agree with him, or whether it comports with an "Originalist" interpretation. You are not the POTUS. Your opinion means nothing. If Congress wants to limit Trump's ability to act with respect to an invasion / insurrection / rebellion / emergency, they could
perhaps pass a statute with a veto-proof majority. Otherwise, they are stuck with Trump's judgment, and the Court is powerless to help. In conclusion, Trump can declare that the massive influx of illegal aliens constitutes an invasion, and you can do nothing about it. The end.