He's wasn't that liberal. Slightly left of center. Check out "Roll Call" (a data base of every Congress' vote and each Senator), they do an average of every congress and since the 1960s, Congress has been moving to the right. politikitty has mentioned this database several times to BDJ when he asserts the President Bush was no conservative (Presidents can offer their views on specific bills in Congress, even though technically they can't vote, and Bush was extremely conservative).