Republican's victory gives GOP an eight-seat pickup in the Senate after 2014 midterms.
The embattled senator meant to say she didn’t back the Obama agenda 100 percent of the time.
Rep. Bill Cassidy (R) is widely expected to topple the last incumbent Deep South Democrat.
The poll shows Cassidy leading Landrieu by 16 points.
She didn’t get any financial help from the Senate campaign arm in the Louisiana runoff.
Outside spending on Democrat's behalf makes up less than 1 percent of all campaign TV ads.
The potential matchup pits the incumbent Senator against the Granite State governor.
Democrat accused her GOP opponent of hiding in D.C. to avoid discussing billing allegations.
“He’s going to be fighting more than President Obama,” Sen. Landrieu alleges.
Sen. Mary Landrieu (D-La.) and Rep. Bill Cassidy (R-La.) were absent ahead of Saturday's vote.