A massive ad war is about to begin in the races in three contested Pennsylvania Congressional districts -- including the nationally watched race between GOP Rep. Curt Weldon and Dem challenger Joe Sestak. The National Republican Campaign Committee and its Dem counterpart have bought up an astoundingly high combined total of $16.1 million in campaign advertising for the three districts during the month leading up to the Nov. 7 election. More details on their buys after the jump.

The NRCC has purchased $8.4 million in ad time for Reps. Curt Weldon (PA-07), Michael Fitzpatrick (PA-08), and Jim Gerlach (PA-06).

Meanwhile, the DCCC has booked $7.7 million for challengers Joe Sestak, Patrick Murphy, and Lois Murphy. The $7.7 million for the three Democratic candidates represents nearly 15% of the $51.5 million the DCCC has set aside for television ads. There are no current estimates for how much the NRCC has set aside.