Remember Louisiana's unique "open primary," with incumbent Senator Landrieu (D) plus four other Democratic candidates, three Republican candidates, and a Libertarian candidate on the ballot. If nobody receives a majority (as seems highly likely), there will be a runoff on December 6. The consensus of polling indicates that Ms. Landrieu and Republican Bill Cassidy are the two strongest candidates.
Now, ponder for a moment the possibility that on the morning of November 5, there are 50 Republican Senators and Senators-elect, 49 Democratic Senators and Senators-elect, and Louisiana yet to be determined. The Republicans need 51 seats to form a majority; 50 would suffice for Democrats, given Vice President Biden's tie-breaking vote. We could have a month-long battle in Louisiana with the Senate majority -- and every Senate leadership position, and the majority party and chairmanship for each Senate Committee, at stake.
Laissez le bon temps rouler!