Senate Republicans out-raised Democrats by about $1 million in December, but Democrats did better overall in 2011 and have slightly more on hand heading into election year.

The National Republican Senatorial Committee raised $4.5 million in December to the Democratic Senatorial Campaign Committee's $3.5 million. Democrats have $12.2 million in the bank and Republicans have $11.4 million.

Both committees ended the year free of debt.