Changing the formula for the U.S. Census could mean shifting up to two dozen congressional seats to the Democrats, a Republican congressman warned Tuesday, as the Senate prepared to consider the nomination of Robert Groves as director of the Census Bureau. Groves supports “sampling” in the census count. Sampling uses statistical “adjustments” to add people to the Census who apparently were not counted. The Senate Committee on Homeland Security and Government Affairs will hold a hearing Friday on the nomination of Groves, who currently serves as director of the Survey Research Center at the University of Michigan's Institute for Social...