Mr. Paul, whose anti-interventionist stance aligns closely with what the president has espoused, said he fears that Mr. Bolton's go-it-alone mindset would lead to "secret wars" around the globe.
"John Bolton still believes the Iraq War was a good idea. He still believes that regime change is a good idea. He still believes that nation-building is a good idea," said the senator. "I think that his history of sort of acting on his own, my fear is that secret wars would be developing around the globe. And so, no, I think he would be a bad choice."