What does Colin Powell’s endorsement do for Barack Obama?

Posted Oct. 20, 2008, at 5:01 p.m.
Last modified March 20, 2011, at 3:26 a.m.

The former Secretary of State, chairman of the Joint Chiefs and retired general, who is a life-long Republican, endorsed the Illinois senator on Sunday’s “Meet The Press” show on NBC. Will this win over undecided voters, or even moderate Republicans? Will it persuade military retirees – who make up a big bloc of voters in Florida – to vote for Sen.

Obama? Or will it be dismissed this late in the process because most voters have made up their minds? Do endorsements of any kind have influence?