Louisiana: Bill Cassidy Trumps Sen. Mary Landrieu In Final Election of 2014

BREAKING: Cassidy defeats Landrieu in Louisiana Senate race, bolstering GOP majority in new Senate.
— The Associated Press (@AP) December 7, 2014

MORE: Republican Bill Cassidy defeats Democratic Sen. Mary Landrieu to push GOP majority to 54 seats: http://t.co/90hPTSlNkD
— The Associated Press (@AP) December 7, 2014

It was a foregone conclusion, but with Bill Cassidy's official win over 3-term Democratic Sen. Mary Landrieu, the official gain for Republicans in the US Senate is brought to a total of nine.

This gives Republicans a 4 seat majority.