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(via Instapundit) “Is the bottom falling out for Barack Obama?” Michael Barone takes a look.

The Rasmussen tracking poll showed Obama leading Clinton 49 to 41 percent before Wright spoke to the National Press Club. Afterward the numbers were 46 to 44 percent in favor of Clinton. The Gallup Poll had Obama leading Clinton 50 to 41 percent the night before the Pennsylvania primary. The results reported May 1 were Clinton 49 percent, Obama 45 percent.