McCain raises $12 million in February

As an indicator of the enthusiasm gap between the parties, this is a poor performance for the GOP's presumptive nominee.

Likely Republican presidential nominee John McCain raised a little over $12 million in February, two campaign sources tell CNN's John King.

That compares to the $35 million the Clinton campaign has reported raising in the same time period. Obama's campaign has not said how much it raised in February, but has indicated it is significantly more than Clinton's total.