The Republican committee is still carrying $9.5 million in debt, the same amount it posted at the end of the first quarter. But the more than $7 million cash on hand is a significant increase from the $5.3 million the NRSC posted at the end of March.

Republicans believe they have a solid chance of netting the six seats they'll need to take back the Senate in 2014, as multiple retirements and strong recruits in red states like West Virginia and South Dakota have given them pickup opportunities.

But they face potentially bruising primaries in Georgia and Alaska, and have yet to front candidates in winnable North Carolina and Iowa.

The Democratic Senatorial Campaign Committee reported $8.62 million cash on hand.

--This post was originally published on Friday at 6:10 p.m. and last updated on Saturday at 10:59 p.m.