Peter Wallsten of the Wall Street Journal writes, “Libertarianism is enjoying a recent renaissance in the Republican Party.” He cites Ron Paul’s winning the presidential straw poll earlier this year at the Conservative Political Action Conference, Rand Paul’s upset victory in the Kentucky senatorial primary, and former governor Gary Johnson’s evident interest in a libertarian-leaning presidential campaign. Johnson tells Wallsten in an interview that he’ll campaign on spending cuts – including military spending, on entitlements reform, and on a rational approach to drug policy.

Meanwhile, on the same day, Rand Paul had a major op-ed in USA Today discussing whether he’s a libertarian. Not quite, he says. But sort of:

In my mind, the word “libertarian” has become an emotionally charged, and often misunderstood, word in our current political climate. But, I would argue very strongly that the vast coalition of Americans — including independents, moderates, Republicans, conservatives and “Tea Party” activists — share many libertarian points of view, as do I.

I choose to use a different phrase to describe my beliefs — I consider myself a constitutional conservative, which I take to mean a conservative who actually believes in smaller government and more individual freedom. The libertarian principles of limited government, self-reliance and respect for the Constitution are embedded within my constitutional conservatism, and in the views of countless Americans from across the political spectrum.

Our Founding Fathers were clearly libertarians, and constructed a Republic with strict limits on government power designed to protect the rights and freedom of the citizens above all else.

And he appeals to the authority of Ronald Reagan:

Liberty is our heritage; it’s the thing constitutional conservatives like myself wish to preserve, which is why Ronald Reagan declared in 1975, “I believe the very heart and soul of conservatism is libertarianism.”

Reagan said that several times, including in a Reason magazine interview and in a 1975 speech at Vanderbilt University that I attended. A lot of libertarians complained that he should stop confusing libertarianism and conservatism. And once he began his presidential campaign that fall, he doesn’t seem to have used the term any more.

You can see in both the Paul op-ed and the Johnson interview that major-party politicians are nervous about being tagged with a label that seems to imply a rigorous and radical platform covering a wide range of issues. But if you can call yourself a conservative without necessarily endorsing everything that William F. Buckley Jr. and the Heritage Foundation – or Jerry Falwell and Mike Huckabee – believe, then a politician should be able to be a moderate libertarian or a libertarian-leaning candidate. I wrote a book outlining the full libertarian perspective. But I’ve also coauthored studies on libertarian voters, in which I assume that you’re a libertarian voter if you favor free enterprise and social tolerance, even if you don’t embrace the full libertarian philosophy. At any rate, it’s good to see major officials, candidates, and newspapers talking about libertarian ideas and their relevance to our current problems.