Congress must retain the power to authorize war, which is what the framers intended.
Defense Secretary James Mattis and Secretary of State Rex Tillerson told the Senate Foreign Relations Committee on October 30 that the Trump administration has all the legal authority it needs to kill people anywhere in the world. But just in case Congress wishes to update its old Authorization for the Use of Military Force (AUMF), Mattis and Tillerson told them how to do it: Write a blank check to the president.
The October 4 killings of four US soldiers on a "routine training mission" in Niger brought the committee's hearing into sharper focus. It turns out the presence of these troops in Niger was unlawful.
Mattis claimed the four dead US soldiers were just there on a train-and-advise mission. "I think it was reasonable to think they could go out there and train these [Niger] troops without the idea they're going into direct combat; but" he admitted, "that's not a complete answer. I need to wait until I get the investigation to fully appraise it."
Derek Gannon, a former Green Beret, said , "[US military involvement in Africa] is called Low Intensity Irregular Warfare, yet technically, it's not considered war by the Pentagon. But," he added, "warfare is warfare to me."
Mattis insisted that Title 10 of the US Code grants authority for train-and-advise missions anywhere in the world. But the War Powers Resolution (WPR), passed by Congress in the wake of the Vietnam War, specifies that the president's authority to order US troops into hostilities cannot be inferred from any provision of law that does not specifically authorize the use of US forces in hostilities. And Title 10 does not.
The WPR allows the president to introduce US Armed Forces into hostilities or imminent hostilities in only three situations:
First, after Congress has declared war, which has not happened since World War II. Second, in "a national emergency created by attack upon the United States, its territories or possessions, or its armed forces," which had not occurred prior to the killings of the US troops in Niger. And third, when there is "specific statutory authorization," such as an Authorization for the Use of Military Force.
In the 2001 AUMF, Congress authorized the president to use military force against individuals, groups and countries that had supported the 9/11 attacks. Congress rejected the George W. Bush administration's request for open-ended military authority "to deter and preempt any future acts of terrorism or aggression against the United States." That AUMF does not authorize US military action in Niger against ISIS, which didn't even exist in 2001 when Congress issued it.
The WPR requires the president to report to Congress within 48 hours of introducing US forces into hostilities. That report must explain the circumstances necessitating the introduction of US Armed Forces, the constitutional and statutory authority for the deployment, and the estimated scope and duration of the hostilities or involvement.
Many in Congress, including Sen. Lindsey Graham (R-South Carolina) and Senate Minority Leader Chuck Schumer (D-New York), were not aware there are currently 800 US troops stationed in Niger. Sen. Tim Kaine (D-Virginia) told the New York Times, "I don't think Congress has been completely kept up to date."
The president must withdraw the troops within 60 days of initiating the use of military force unless Congress declares war or provides a "specific authorization." Congress has not specifically authorized US troops to fight ISIS in Niger.
Sen. Bob Corker (R-Tennessee), chairperson of the Senate Foreign Relations Committee, stated at the hearing that Congress has been notified of troop deployments around the world, including the buildup in Niger, and has responded by funding the Department of Defense.
According to the Congressional Research Service, "Congress has shaped US engagement with Niger and the US military footprint in the country through its authorization and appropriation of funding for US security cooperation and assistance programs, and through its authorization of funding for US military construction."