7-11 is using a very unscientific way to determine the President of the United States.

7-11 is conducting their own poll to determine the winner by using coffee cups.

But can brew predict if Mitt Romney or President Barack Obama will win the 2012 Presidential Election?

Red and blue cups were stacked neatly outside the 7-11 Mobile Oval Office that rolled into town Saturday morning.

The tour bus has visited with voters in 20 major cities since September, asking them to choose who will to sit in the real Oval Office.

The poll is unscientific but 7-11 says its has successfully predicted the winner of the past three presidential campaigns.

"We get within three or four margin points, it's that close," said Ray Kruckner, market manager of Arizona 7-11 stores.

Current tally: Obama 59% - 41% Romney