DELRAY, Fla. (October 23, 2012)--President Barack Obama says the most serious issue in the White House race is whom voters can trust.

Mr. Obama, aiming to draw a contrast with Republican rival Mitt Romney after their final presidential debate, says that while Romney is shifting his positions on key issues, voters 'can trust that I say what I mean."

The president is also putting fresh emphasis on his second-term agenda, following criticism that he hasn't provided enough specifics about what he would do with four more years in office.

At a rally Tuesday in Florida, Mr. Obama ticked through a series of previously introduced policy proposals, including boosting education spending and manufacturing.