Cassidy (R) outraised Sen. Landrieu (D) by $500,000 in last month and has more in the bank.
Louisiana Democrat tries to portray Rep. Bill Cassidy (R-La.) as out of touch.
The gun rights group's new ad ties the Louisiana Democrat to President Obama.
Looming runoffs in Louisiana and Georgia could extend Election Day until January.
Rep. Cassidy's (R) opponent, Sen. Mary Landrieu (D), was caught helping with a keg stand.
Conservatives are eyeing a November clash to get their pick past the GOP primary favorite.
The vulnerable Democrat raked in $2.1 million to Rep. Bill Cassidy's (R-La.) $1.6 million.
The GOP doctor says allegations he wrongly billed LSU while in Congress are bogus claims.
But the Louisiana Democrat argued the bill's failure won't undermine her reelection efforts.
House Dems are furious their Senate colleagues have hijacked Keystone to save Landrieu.
Rob Maness (R) is running against Rep. Bill Cassidy (R) and Sen. Mary Landrieu (D).
Maness says questions about Sen. Landrieu's (D) home should disqualify her from the ballot.
Independent candidates are complicating the Senate math for Democrats and Republicans.
The vulnerable Democrat will appear with Michelle Obama at a Saturday event in New Orleans.