Some of the hardest hitting and most innovative ads in the presidential campaign are being run by outsiders right now.

Here's one from the Service Employees union that tries to take on McCain by taking advantage of the debut of "Mama Mia" (which, probably to their chagrin, was dwarfed by the new Batman movie this weekend...so fewer people might get it.)

This anti-Obama ad is by a group calling itself Let Freedom Ring. It's shorter, and hits harder.

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