Senator Mitch McConnell of Kentucky has $6 million six million in the bank for his re-election bid in 2014.
But he doesn't have an opponent yet.
McConnell says he expects the Democrats to nominate a good candidate and he wants to be ready.
McConnell will be running for his sixth term.
In 2008 he spent $20 million and beat Bruce Lunsford by 6 percentage points.