Published: Oct 23, 2012 11:27 AM EDT

DELRAY, Fla. (AP) - President Barack Obama says the most serious issue in the White House race is who voters can trust.
    
Obama is aiming to draw a contrast with Republican rival Mitt Romney following their final presidential debate. The president 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, Obama ticked through a series of previously introduced policy proposals, including boosting education spending and manufacturing.

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