Alana Goodman reports for the Washington Free Beacon that former United Nations Ambassador John Bolton is preparing to put his money where his mouth is when it comes to fighting isolationism within the Republican Party.

Republican isolationists could find themselves under fire in the 2016 primaries from John Bolton’s Super PAC, as the hawkish former United Nations ambassador ramps up his effort to elevate national security as a top GOP policy issue.

Bolton told the Washington Free Beacon that he is considering targeting incumbent isolationists in Republican primaries through his BoltonPAC, although he has not yet made a final decision.

“I have not made any decisions one way or the other on active campaigns against any incumbents,” Bolton said in an interview on Friday. “That would be an important decision—I haven’t made it yet. I think it’s important to show candidates and incumbents that a strong national security posture is something that is favorably viewed, broadly.”

Bolton announced endorsements and BoltonPAC contributions for three candidates last week.

The former U.S. ambassador to the United Nations said he chose Louisiana gubernatorial candidate Sen. David Vitter, incumbent Rep. Ron DeSantis (R., Fla.), and California congressional candidate Paul Chabot because of their strong backgrounds on national security issues.

“It’s part of what I think will be a long-term effort to get national security back in the center of the overall political debate,” said Bolton.