Former business exec Curt Clawson leads pack of Republicans vying to fill Trey Radel's seat.
The ad is the FWD.us's first major foray into the 2014 elections.
The group is attacking the congressman for opposing "DREAMERs" in the military.
The move allows the group to buy airtime while prices are lower.
Evan Jenkins (R) blames Rahall for House Majority PAC ads that fact-checkers have questioned.
Leah Gordon was accused of leaking the tape of the congressman kissing a staffer.
In February, Democrats held only a 2-point lead.
The first fundraising quarter of 2014 is in the books.
Rep. John Barrow (D-Ga.) is fighting to hold onto his House seat.
Sink was defeated in a special election earlier this year, but Dems wanted her to try again.