LAS VEGAS (AP) - President Barack Obama is heading to Nevada for a campaign rally featuring a free concert by pop singer Katy Perry at a park near downtown Las Vegas.

Obama embarked Wednesday on a whirlwind two-day tour to key battleground states starting in Davenport, Iowa, before heading to Denver and then to the Democratic campaign rally at Doolittle Park in the West Las Vegas neighborhood.

On Thursday, he heads to Florida, Virginia and Ohio.

Obama's appearance in Las Vegas will be his 10th this year in Nevada - a swing state in the Nov. 6 presidential election.

Obama visited Desert Pines High School on October 1, and stayed a couple of nights at a Lake Las Vegas resort before his first debate with Republican presidential candidate Mitt Romney.

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