Jeff Riggenbach makes a very good claim to that notion in Why I Am a Left Libertarian in which he charts the differences between authoritarian/totalitarian political views vs. the individualist, liberal views of libertarianism.
I was very fond of this particular passage:
Some libertarians are in the habit of saying, “We libertarians are neither Right nor Left; we are libertarians.” But no matter how emphatically they thump their chests while saying this, they’re wrong. They have allowed themselves to be deceived and misled by a political confidence game foisted on the American electorate beginning in the 1930s, when an opportunistic demagogue named Franklin Delano Roosevelt began passing off as the newest kind of “liberalism” a package of homilies and government programs that had traditionally been presented to the American public by the Republican Party, the party of big business, the party that was in favor of capitalism but opposed to the free market. Roosevelt’s “New Deal” consisted mainly of government programs introduced by his Republican predecessor, Herbert Hoover, laced with a generous dose of the bribery of the electorate first popularized by Otto von Bismarck. Some will object that conservatives have historically been for individual liberty and free markets, but this view is uninformed and ahistorical. The Republicans who opposed the New Deal opposed it mostly because they weren’t running it themselves; they took their libertarian rhetoric from true liberals, the classical liberals who are labeled “the Old Right” today by the historically confused. These people, many of them publicists like H.L. Mencken, Albert Jay Nock, and Isabel Patterson, had joined the Republicans after being forced out of the Democratic party, apparently in the belief that only by doing so could they oppose FDR’s policies. The party adopted their rhetoric, but they employ it only to dupe that subset of the electorate that cares about such things; then, once in power, they do as FDR did, the precise opposite of what they claimed to believe in.