Has Rush Limbaugh finally turned into a liability for the Republican Party? That would be delicious for liberals

One progressive group is trying to use Limbaugh as a blunt object against Republican senators who might vote against President Barack Obama's stimulus package, which passed the House with absolutely no Republican votes on Wednesday. Americans United for Change--which has joined with MoveOn.org, SEIU and AFSCME to air television ads targeting five GOP senators in four states--has launched a 60-second radio spot against three other Senate GOPers, and the commercial's main ammo is Limbaugh. The three senators in this line of fire are John Ensign of Nevada, George Voinovich of Ohio, and Arlen Specter of Pennsylvania.

The commercial notes that Limbaugh has declared that he hopes Obama fails, and it asks whether these senators will side with the radio loudmouth or with Obama. You can hear it here. And the script: