Video on msnbc.com: Bad weather put a damper on Mitt Romney's "pre-buttal" of President Obama's 2012 convention speech in Charlotte, while the President made a fiery speech in Romney's home state of Michigan. MSNBC’s Lawrence O'Donnell talked to AOL-Huffington Post editorial director Howard Fineman and former DNC communications director Karen Finney about the cases the candidates are making to voters.
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