Come back to earth, David Boaz. Over at CATO@liberty, Boaz claims that,

Only if you believe that continuing to support the war in Iraq outweighs all other issues combined can a conservative reasonably support Joe Lieberman. And apparently a lot of Republicans and conservatives are willing to toss aside his commitment to high taxes, higher spending, more regulation, and entitlement expansion in order to get that vote for Bush’s war.

Or maybe you looked at the polls, and figured out that a vote for Schlesinger is effectively a vote for Lamont, whom Boaz never even mentions. In American politics, "I support Smith because of his views on A, B, and C" really means "Smith isn't as bad as Jones on A, B, and C, and they're equally bad on D, E, and F; Jones is better on G, but that's less important."