At The Washington Post, Greg Sargent reports that five red-state Democrats—Kay Hagan of North Carolina, Mary Landrieu of Louisiana, Mark Pryor of Arkansas, Joe Donnelly of Indiana, and Heidi Heitkamp of North Dakota—have been unwilling to voice support for expanding the background-check program—"the centerpiece," he writes, "of President Obama's package of gun reforms." Their rationale is straightforward: Supporting this policy might hurt us in our states, or leave us vulnerable to Republican attacks.