David: As I understand it, some Democrats who co-sponsored Heath Shuler’s immigration-enforcement bill aren’t signing the discharge petition because their co-sponsorship was just for CYA purposes for November. If the bill actually came to the floor, they might have to put their vote where their mouth is, as it were. That may happen in any case, though — I also hear that Homeland Security Committee Chairman Benny Thompson has scheduled a full committee hearing on the bill for April 10.