https://www.washingtonpost.com/news/chec...2295a7df56
During his campaign, Trump promised that he would “do everything in my power never to be in a position where we will have to use nuclear power.” But he also repeatedly declined to say whether he would use nuclear weapons first in a conflict. On Thursday, he said he would like to “de-nuke the world,” but that until other countries get rid of their nuclear weapons, “we will be the most powerful nuclear nation in the world, by far.”
A December 2016 assessment by the Congressional Research Service stated that the president “does not need the concurrence of either his military advisors or the U.S. Congress to order the launch of nuclear weapons.” Additionally, the assessment said, “neither the military nor Congress can overrule these orders.”
The reason is simple: The system is set up for the United States to launch an attack within minutes, so that if the United States is under a nuclear attack, it can respond almost instantly, said Bruce Blair, a former nuclear watch officer. Trump would presumably meet with Mattis, White House Chief of Staff John F. Kelly, Joint Chiefs of Staff Chairman Gen. Joseph F. Dunford Jr. and Army Lt. Gen. H.R. McMaster, the White House national security adviser, before launching a preemptive attack, but it would “really be uncharted territory” if they sought to stall or slow down an order from the president, Blair said.
Under the existing War Powers Act of 1973, the president also is not required to seek congressional approval for any military action until 60 days after the start of a war. Two lawmakers, Rep. Ted Lieu (D-Calif.) and Sen. Edward J. Markey (D-Mass.), sought to stop the president from launching a first-strike nuclear attack until Congress declares war, but the effort hasn’t gone anywhere and is unlikely to with Republicans controlling both chambers of Congress...
Steven F. Hayward, a conservative policy scholar, said that if Trump’s senior military advisers stood united against carrying out a preemptive nuclear strike, the “real remedy would be resignation.” Hypothetically, doing so might trigger impeachment proceedings, Hayward said, but it isn’t clear whether it would be quick enough to stop the president from launching an attack.
“It could happen,” Hayward said. “It would be pretty dramatic and it would be very unclear what would happen, but it could happen. We’re really in uncharted waters here.”
Bruce Ackerman, a professor of law and political science at Yale University, said that the principle of civilian control of the military also looms large — “even when the civilian in control is as unpredictable and belligerent as President Trump.” Latin American nations have modeled their constitutions along American lines, and their experiences suggest that terrible consequences follow when generals defy their presidents, even under compelling circumstances.
“Worse yet, once the principle is violated, it becomes a precedent for future generals to take the law into their own hands,” Ackerman said. “We cannot allow this dynamic to take hold here. If Trump’s team can’t convince him, they should obey the orders of their commander in chief.”