WASHINGTON--There's a new group of registered voters whom experts are calling the "persuadables."

The latest Associated Press GFK poll shows about a quarter of the nation's registered voters are still undecided about who they will vote for in this year's presidential race.

This group of voters has little, if any, preference for President Barrack Obama or Mitt Romney.

Experts also say “the persuadables" will be a key demographic in the election.

Both candidates are trying to make their cases to this political middle.