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By a 5-4 margin, the Supreme Court upheld the core elements of Obama's much-debated health care overhaul, which even he embraced as "Obamacare." To widespread surprise, the decisive vote came from John Roberts, the generally conservative-leaning chief justice appointed by Republican George W. Bush. Romney, as GOP presidential nominee, vowed to repeal the law if he won, but Obama's victory ensured the plan would proceed, with complex ramifications for insurers, employers, health-care providers and state governments.
WASHINGTON, DC - JUNE 28: Obamacare supporters celebrate as they respond to the Supreme Court ruling on the Affordable Health Act June 28, 2012 in front of the U.S. Supreme Court in Washington, DC. The Supreme Court has upheld the whole healthcare law of the Obama Administration. (Photo by Alex Wong/Getty Images)