https://www.cnn.com/2018/09/06/politics/rand-paul-white-house-op-ed-donald-trump-new-york-times/index.html
"I think it's not unprecedented for people with security clearances to be asked to, whether or not they were revealing things against the law under oath and also by lie detector," the Kentucky Republican said on Capitol Hill. "We use a lie detector test routinely for CIA agents and FBI agents. I think if you have a security clearance in the White House, I think it would be acceptable to use a lie detector test and ask people whether they are talking to the media against the policy of the White House."
He continued: "This could be very dangerous if the person who is talking to the media is actually revealing national security secrets. So, yes, I think we need to get to the bottom of it."