President Barack Obama and Republican challenger

President Barack Obama and Republican challenger Mitt Romney continue to campaign across the country with the U.S.
 presidential election less than two weeks away. President Obama cast an early vote in his hometown of Chicago, Illinois, while Mitt Romney held rallies in the key state of Ohio.

Concluding what he called his "48-hour-fly-around-marathon campaign extravaganza" across the country, Obama flew on Air Force One from Los Angeles, California to Tampa, Florida.

Florida is hotly contested, although recent polls have shown Romney ahead there. After Florida it was on to Virginia, another important battleground state where a win could be crucial, as both men seek 270 electoral votes needed to secure victory November 6.

Obama used his appearance  in Richmond to comment about a high-profile endorsement from former Secretary of State Colin Powell.

"I was proud and humbled to learn that we have Colin Powell's support in this campaign. I am grateful to him for his lifetime of service to his country both as a soldier and as a diplomat, and every brave American who wears this uniform of this country should know that as long as I am your commander-in-chief, we will sustain the strongest military the world has ever known," said President Obama.

At each stop, the president  used the term "Romnesia" to describe what he calls the former Massachusetts governor's shifting positions on domestic and foreign policy issues.

"If you can't remember what you said just a week ago, if you can't remember the plans on your own web site, and you're worried you might be coming down with a case of Romnesia, I want you to know Obamacare covers pre-existing conditions. We can make you well," said Obama.