This morning, in a column for National Review Online, I criticized a number of Democrats and Republicans who voted against Obamacare but had not signed a discharge petition that would force a floor vote on repealing the new health care law. One of the Republicans I singled out was Rep. Castle of Delaware, who is now seeking the GOP nomination for US Senate. This afternoon, Rep. Castle’s staff informed me that he intends to sign that petition as soon as he returns to Washington after the recess. That leaves five Republicans who have not signed. For the record, they are: Mark Kirk of Illinois, Joseph Cao and Charles Boustany of Louisiana, David Reichert of Washington, and Shelley Moore Capito of West Virginia.