How Republican Senators Will Attack Obama's Legacy

Senator Charles "Chuck" Grassley, a Republican from Iowa, questions witnesses during a Senate Judiciary Committee hearing in Washington, D.C., U.S., on Tuesday, Feb. 4, 2014.

Photographer: Andrew Harrer/Bloomberg

The Senate Judiciary Committee will get a jolt when Republican Charles Grassley becomes chairman and pursues investigations that could tarnish President Barack Obama’s legacy.

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