BATON ROUGE - Louisiana's four major candidates for governor have spent $13.5 million on the race, with Republican U.S. Sen. David Vitter's campaign shelling out more than $6 million. 

The latest fundraising reports were due Wednesday.

Candidates have raised nearly $24 million through Oct. 4. And the pace of spending has grown as the Oct. 24 election nears.

In the most recent 20-day period, Vitter spent $2.8 million as he filled the airwaves with TV spots and sought to combat slipping poll numbers. He has $1.4 million in the bank. 

Meanwhile, Republican Lt. Gov. Jay Dardenne spent $1.1 million and had $700,000 left. Republican Public Service Commissioner Scott Angelle spent $756,000 and had $569,000 remaining. 

Democratic state Rep. John Bel Edwards spent the least, $451,000, and was sitting on a $1.2 million account.