In his Monday night speech on the Afghan War, President Trump committed the US to an essentially open-ended escalation of the conflict without any specific limitations, while granting commanders broader authority to unilaterally target "the enemy."
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I doubt The Founders wanted their country to engage in "open-ended wars". That is why they inserted this clause into our constitution:
Article I, Section 8
12: [The Congress shall have Power] To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;
But we no longer live in the country they envisioned, do we? We wage war for just about any reason imaginable, or for no reason at all.