WASHINGTON--Mayor Rahm Emanuel hits battleground Ohio to stump for President Barack Obama on Saturday and Sunday--revving up Obama volunteers and shoring up Jewish votes. Obama's former chief of staff is a headliner on CBS' "Face the Nation" on Sunday morning; Sen. John McCain, R-Ariz. is also booked on the show to represent the Mitt Romney campaign.

Both Emanuel and McCain stumped for their respective candidates in Florida last week..