Political experts are predicting the race for U.S. Senate in Pennsylvania could be one of the most expensive ever.
As the campaign between Republican Dr. Mehmet Oz and Democrat John Fetterman heats up, millions have already been spent on the campaign.
Most of the money is expected to be spent on television and radio advertising.
The most ever spent on a race in Pennsylvania was in 2016 between current Senator Pat Toomey and Democrat Katie McGinty, which hit $164 million.
