I'm certainty not a Lefty or a "Progressive".
You meant a Dem rather than a liberal, or if you meant Lefty instead of liberal, then you are talking about something different.

Wiki:
Liberalism in the United States is a broad political and philosophical mindset, favoring individual liberty, and opposing restrictions on liberty, whether they come from established religion, from government regulation, or from the existing class structure.[1] Liberalism in the United States takes various forms, ranging from classical liberalism to social liberalism to neoliberalism.
...
The result was a narrow victory for Republican Richard Nixon, a man who, although a California native, was largely regarded as from the old Northeast Republican Establishment, and quite liberal in many areas himself. Nixon enacted many liberal policies, including the establishment of the Environmental Protection Agency, establishing the Drug Enforcement Agency, normalizing relations with Communist China, and starting the Strategic Arms Limitation Talks to reduce ballistic missile availability.

Nixon and the liberal consensus

While the differences between Nixon and the liberals are obvious – the liberal wing of his own party favored politicians like Nelson Rockefeller and William Scranton, and Nixon overtly placed an emphasis on "law and order" over civil liberties, and Nixon's Enemies List was composed largely of liberals – in some ways the continuity of many of Nixon's policies with those of the Kennedy-Johnson years is more remarkable than the differences. Pointing at this continuity, Noam Chomsky has called Nixon, "in many respects the last liberal president."
http://en.wikipedia.org/wiki/American_liberalism

I'm also not a neocon. I would say, that neocons and Nixon would have been more to the Left than compared to myself.
I don't consider myself a moderate or centrist. And generally whenever I do those political tests, score towards libertarian side of spectrum and generally towards the middle- I don't believe these test are very accurate- because like I said I'm not a centrist or moderate [and I don't even know what it means to be a moderate/centerist other than you don't a have opinion on matters or don't want a fight- though the tests indicating I'm towards libertarian spectrum does seem accurate to me]. Oh, Also I think Noam Chomsky is fucking idiot, but everyone knows Nixon was liberal Republican and certainly to the Left of Kennedy. That Lefties dispised Nixon and loved Kennedy isn't really relevant. [Nor that a hardcore Lefty assassinated Kennedy isn't particularly surprising to me.]

Continuing from wiki:
Quotations by the founders of liberalism in the United States

Thomas Paine wrote,

"Society in every state is a blessing, but Government, even in its best state, is but a necessary evil." [12]