Sen. Lisa Murkowski Sen. Lisa Murkowski

Sen. Lisa Murkowski of Alaska, in the Capitol on Wednesday, was one of two Republicans to vote against opening debate on the health care bill on Tuesday. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

Senators Lisa Murkowski, an Alaska Republican, and Ron Wyden, an Oregon Democrat, discussing their new campaign finance legislation at an April 23, 2013 Capitol Hill news conference. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images