MENTOR, Ohio & PORTSMOUTH, N.H. (AP) - President Barack Obama says voters need to be able to trust their president because they can't predict what challenges he'll face in office.

Speaking to supporters in Ohio, Obama says a president must say what he means and mean what he says. And he says after four years in office, voters know what he believes.

The president is trying to draw a contrast with challenger Mitt Romney, saying the Republican nominee has been changing his positions to make them more politically appealing.

Obama spoke to more than 4,000 people at a high school gymnasium.

Meanwhile, Mitt Romney is in Portsmouth, New Hampshire criticizing President Barack Obama for urging Americans to vote as the "best revenge."

It was on Friday when Obama told an Ohio crowd that "voting is the best revenge." Romney told supporters in New Hampshire on Saturday - the final weekend before the election - to vote for love of country instead.

Romney also gave the Republican Party's weekly radio address, and he said Obama "promised changed but he could not deliver." Romney says he's promising change and he has a record of achieving it.

Romney says Tuesday's vote will determine whether the country "settled for more of the same disappointment and decline or whether we took the first step down a new path that will deliver a real recovery and real change."

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