Get ready. The presidential ad campaign coming to a TV and radio near you will be nasty, expensive and heavily influenced by independent groups.
President Barack Obama's campaign is already running ads in six swing states tying Republican Mitt Romney to big oil companies. An independent group that supports Romney is also on the air in battleground states with a spot linking Obama's energy policies to the recent spike in gasoline prices.
Several media buyers provided information to The Associated Press showing that Obama's campaign has spent about $2 million on its ad this month in Iowa, Ohio, Colorado, Virginia, Florida and Nevada.
The Republican group isn't far behind. It has spent about the same amount, or $1.8 million, in the same six states.