John Bolton, the former U.S. Ambassador to the United Nations, tells The Daily Caller he is considering a run for president in 2016 as a Republican.

“I have not decided,” Bolton said in an interview. “And I don’t have a timetable on that.”

But Bolton, who flirted with running in 2012, expressed a desire for a Republican presidential candidate who is capable of taking on likely Democratic presidential candidate Hillary Clinton on national security issues.

“Obviously, if the Democrats nominate Hillary,” he said, “her principle ‘qualification’ is her time as secretary of state. So being able to dissect and explain to the voters why she fails as a leader, I think is going to be critical for whomever is interested in the Republican nomination.”

He also suggested he’s partly driven to consider a run because of the rising influence of “isolationism” in the party.

“I don’t think I have to make a decision as early as some others do,” Bolton said, “but I do think the threat of isolationism is still there in the party. And I think that’s something that is of very much concern to me.”

Asked if he was referring to the libertarian-leaning Sen. Rand Paul, who is also expected to run for president, Bolton said: “I don’t personalize it so much.”

But Bolton went on to question whether Paul shares the same views on foreign policy as his father, former Texas Ron Paul. He was expressed incredulity about how Ron Paul recently gave an interview to “Russian state television” and said America doesn’t have “true democracy.”

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