Los Angeles Mayor and Democratic Convention Chairman Antonio Villaraigosa calls for a vote to amend the platform Wednesday at the Democratic National Convention in Charlotte, N.C. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Texas Gov. Rick Perry is barely registering in the polls in New Hampshire, which holds its primary on Tuesday. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

Former Secretary of State Colin Powell during his appearance Sunday on CBS News' Face the Nation. Chris Usher/CBS News via Getty Images hide caption

itoggle caption Chris Usher/CBS News via Getty Images