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Crisis in Syria tests Obama's political clout at home and abroad

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President Obama touched down in St. Petersburg Thursday for the G20 summit, where he's expected to engage directly with other world leaders seeking support for U.S. led strikes in Syria. Meanwhile back in Washington, more classified briefings are scheduled on Capitol Hill, where the White House is still facing resistance from skeptical members of Congress. NBC News' Luke Russert and Chuck Todd and Rep. Carol Shea-Porter, D-N.H., discuss.