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PBS News Hour
Shields, Brooks on Santorum's Exit, Romney's Poll Woes
Syndicated columnist Mark Shields and New York Times columnist David Brooks discuss the week's top news including Rick Santorum's exit from the GOP race and what that means for Mitt Romney, plus Sen. Richard Lugar's tough re-election campaign, President Obama's push for the "Buffett Rule" and Hilary Rosen's swipe at Ann Romney.
