We have distant memories of Tea Party favorites Sen. Rand Paul and Sen. Marco Rubio once working as a united force against the Obama administration, but Rubio lost a lot of his luster when he threw in with Chuck Schumer, John McCain, Lindsey Graham and the rest of the “Gang of 8” and their amnesty bill.

That was last year. Now, the president’s talk about normalizing relations with Cuba has Paul firing a shot at Rubio for acting like an “isolationist.”

“… and perhaps build a moat?” Ouch.

Paul’s tweets didn’t necessarily fly with all of his followers, in substance, tone, or both.

Rubio hasn’t responded on Twitter, but it’s one ideological battle to keep an eye on.

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