Barack Obama Mobbed By Fans At Rally With Katy Perry (PICTURES) (VIDEO)

Barack Obama was mobbed by enthusiastic supporters after speaking at a campaign rally in Doolittle Park, Las Vegas, on Wednesday.

According to The Huffington Post polling model, the president is leading in Nevada by 50% to Mitt Romney's 46%.

With just 12 days to go until election day, Obama took to the stage in Nevada after a performance by popstar Katy Perry.