Sen. Rand PaulRandal (Rand) Howard PaulGOP senators introduce Trump's plan to claw back billion in spending Pro-Trump super PAC raises .5 million in 6 weeks Trump has exposed Democratic hypocrisy on prison reform MORE (R-Ky.) swiped at New Jersey Gov. Chris Christie (R) on Sunday, saying it would be difficult for Christie to secure the Republican presidential nomination because he isn’t conservative enough.

“The nomination goes through some very conservative primaries,” Paul said on NBC’s "Meet the Press."

“I think there’s room for moderate Republicans in the party, and I really am a believer that we should have an expansive and diverse party ideologically and diverse in many ways, but the primary is a very conservative process and my understanding is it will be more difficult for a moderate to make it through because we truly are fiscal conservatives in our party, and we don’t want to spend money we don’t have,” the Kentucky Republican added.

Paul and Christie are among the top tier of potential Republican presidential candidates for 2016 and have been feuding over who is the stronger conservative since last year.

Paul has accused Christie of “lecturing” Congress and demanding too much for Hurricane Sandy aid, and at one point called Christie the “King of Bacon.” Christie says Paul’s home state is one of the worst for pork-barrel spending and pet projects.