Commentators have suggested that Senator Gregg's decision to not be Commerce Secretary resulted from the White House's decision to conduct the upcoming census within the White House rather than in the Commerce Department as has been customary. Here's the root of the dispute:
The constitutionally mandated “enumeration” determines how many seats each state gets in the House of Representatives, and helps to determine where the district lines are drawn within each state. It will also shift billions upon billions of federal dollars over the next decade from some parts of the country to others because of population-driven financing formulas.
The parties have been at loggerheads for years over how to conduct the census. Most everyone agrees that the traditional method — mail-back surveys and door-knocking follow-ups — fails to count millions of Americans. Democrats argue that the solution is to use statistical sampling models to extrapolate figures for the uncounted people. If minorities, immigrants, the poor and the homeless are the most likely to be undercounted, then such sampling would presumably benefit the Democrats.
Republicans, for their part, argue that statistical sampling is unreliable and that the Constitution mandates an actual count. In 1999, the Supreme Court ruled, 5 to 4, that under current law, sampling techniques could not be used to reapportion House seats from one state to another. But some experts still believe that it could be used in drawing district lines within the states, and to determine money flows.