Shaken By Trump, Senators Ask: What Stops Him From Launching Nukes?

NPR: Critics in the Senate have posed a high-stakes question: Can anything keep President Trump from launching a nuclear attack on his own?

"We are concerned that the president of the United States is so unstable, is so volatile, has a decision-making process that is so quixotic that he might order a nuclear weapons strike that is wildly out of step with U.S. national security interests," said Connecticut Democrat Chris Murphy.

His Massachusetts colleague Ed Markey has offered legislation that would require congressional approval for any first use of nuclear weapons.

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