Sen. Mary Landrieu wants her challenger to bring 63 months of records to Monday's debate.
Warner said he will use his new seat at the leadership table to broker bipartisan compromises.
From top hopefuls to conservative gunners, here's what GOP strategists are thinking.
According to a report in The Washington Post, planning for the appearance took over a year.
Cassidy (R) outraised Sen. Landrieu (D) by $500,000 in last month and has more in the bank.
The GOP doctor says allegations he wrongly billed LSU while in Congress are bogus claims.
The former Hewlett-Packard CEO ran unsuccessfully as a Republican against Sen. Boxer in 2010.
Mitt Romney would tie Hillary Clinton in a hypothetical matchup.
"Something is wrong with criminal justice in America," the senator wrote.