When Donald Trump told Elon Musk one of his first acts as president would be to “close the Department of Education, move education back to the states,” he was invoking a GOP promise that goes back to President Ronald Reagan and the department’s founding.

Chris Hayes explains how Trump's unpopular threat to shutter the Education Department will suffer the same fate as Bush's pledge to gut Social Security

Donald Trump has repeatedly said he wants to close the federal Education Department. But dismantling the agency wouldn't be easy.