Keystone-Stater-backing “RWB Fund” uses $700,000 worth of Michigan air time for positive spot touting Santorum as the only “principled candidate.”

Announcer: “The leader with a bold plan to restore America’s greatness, create dynamic jobs, cut wasteful spending and reform Washington. Rick Santorum — proven conservative.”

Read the script below.

SCRIPT: “Obama’s reckless agenda must be stopped. And there’s only one principled candidate with the courage to do it. Rick Santorum — father, husband, a champion for life. The leader with a bold plan to restore America’s greatness, create dynamic jobs, cut wasteful spending and reform Washington. Rick Santorum — proven conservative.”