Sen. Mary LandrieuMary Loretta LandrieuSenate GOP rejects Trump’s call to go big on gun legislation Project Veritas at risk of losing fundraising license in New York, AG warns You want to recall John McCain? Good luck, it will be impossible MORE (D-La.) and Rep. Bill Cassidy (R-La.) both posted big second quarter fundraising hauls as they prepare to square off in Louisiana's Senate race.

Landrieu brought in just under $1.7 million in the last three months, topping the $1.2 million she brought in during the first three months of the year, and now has nearly $4.9 million in the bank for what's expected to be a tough reelection battle.

"I'm grateful to have a strong and broad group of supporters that believe in growing and expanding the middle class in Louisiana and throughout the country," Landrieu said in a statement announcing her haul. 

"I'm proud to lead the efforts in Congress to secure funds for coastal restoration, fix flood insurance 'reform' and to support small business startups and entrepreneurs that strengthen our economy."

Cassidy, her most likely opponent, raised $1.1 million in the last three months to bring his war chest to $3.2 million.

"I'm incredibly grateful for all the support I’ve received since announcing my candidacy for U.S. Senate," Cassidy said in a statement. 

"Louisianans agree that we need to make Washington more accountable and more people-focused.  They’re tired of overbearing government programs in their daily lives and the paralysis of inept federal bureaucracies stifling job opportunity and small business success."

Both are impressive fundraising quarters, and show how expensive the highly targeted race is likely to become.