Rhode Island Sen. Lincoln Chafee (R) beat back a strong primary challenge from Cranston Mayor Steve Laffey (R) tonight, a victory for which national Republicans deserve considerable credit. The Republican National Committee, White House and National Republican Senatorial Committee coordinated on a vast voter identification effort on Chafee's behalf that, combined with sophisticated microtargeting and a big get-out-the-vote operation, won the day for the senator....