DANTE SCALA headline needed

Later this week, President Obama will announce his pick for Commerce secretary. And, according to White House officials, it's a Republican from New England: New Hampshire Sen. Judd Gregg.

But Gregg says he would only accept the nomination if the governor of New Hampshire appoints a Republican to replace him in the U.S. Senate.

For a look at the political ramifications of a Gregg nomination, we turn to Dante Scala, a political science professor at the University of New Hampshire.