Didn't support same sex marriage, pro-life, pro-death penalty (while in Congress): not libertarian. Like any other label, it depends on how you define it. If you take Thondalar's strict definition of libertarian, everything is mutually exclusive with it. That
test we took a long time ago defines libertarian as radical capitalist, which is by definition mutually exclusive with conservatives of all stripes and is equidistant from what the test calls left wing (radical socialist) and right wing (conservative capitalist).
Economically conservative and socially liberal is a tough sell on the national stage, and here's a sweet graph showing the states:
Quadrant 2 would be the libertarian, and the best case you could make would be Minnesota, and it's not a great one.
Quadrant 4 is interesting too: economically liberal and socially conservative, what our test called pro-government and what other people call communist: West Virginia, Kentucky, and Montana! Commies.