His third-quarter fundraising haul was a marked decrease from his second-quarter haul of $1.1 million, but he's got a solid $3.4 million cash in the bank.

Cassidy is the establishment pick to challenge Sen. Mary LandrieuMary LandrieuCNN producer on new O'Keefe video: Voters are 'stupid,' Trump is 'crazy' CNN's Van Jones: O'Keefe Russia 'nothingburger' video 'a hoax' Trump posts O'Keefe videos on Instagram MORE (D), whom Republicans believe to be vulnerable due to Louisiana's increasingly red tint.

She has not yet released her third-quarter numbers, but at the end of July had nearly $5 million cash on hand.