Billmon: The Lieberman Principles

Pay any price, bear any burden, sling any bullshit:

Sen. Joe Lieberman filed to run for re-election in November as an independent, saying Wednesday it would be "irresponsible and inconsistent with my principles" to quit.

So since when did being a sore loser constitute a "principle"?

Or is the "principle" at stake the divine right of Joe Lieberman to be a U.S. Senator?