Emory University political science professor and national politics expert Merle Black discusses what Newt Gingrich needs to do to stay at the top of the polls, what battleground states will decide the 2012 election and who would be the likely favorite in Gingrich vs. President Obama. Black, Emory's Asa Griggs Candler Professor of Politics and Government, is a renowned expert on national politics and the foremost authority on politics in the South. One the nation's most incisive commentators, Black is coauthor of "Divided America: The Ferocious Power Struggle in American Politics."