Sen. Mike Lee tells Politico that he's willing to buck Senate GOP leadership and mount a filibuster to block an increase of the national debt limit.

"Look, I intend to fight the debt ceiling increase and use as many tools in my disposal as I can muster under the circumstances," Lee told POLITICO Wednesday. "At this point, there are a lot of variables to figure out exactly what the best procedural tool is and what the best way of influencing my colleagues not to do this is. I'm not ruling anything out."

Asked about leadership's wariness of a potential filibuster, Lee said: "On an issue this big, obviously there is going to be some coordination among Republicans, and I want to make sure anything I do doesn’t undo what my colleagues within the party are doing."