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This May 14, 2014 file photo shows Sylvia Mathews Burwell, President Barack Obama's nominee to become secretary of Health and Human Services testifying on Capitol Hill in Washington. More than 2 million people who got health insurance under President Barack Obama's law have data discrepancies that could jeopardize coverage for some, a government document shows. On Wednesday, Burwell easily passed a key test vote in the Senate. (AP Photo/J. Scott Applewhite, File)