From the Center for Responsive Politics:

In the contests for Congress, 1st Quarter fundraising totals for some congressional candidates — many of them incumbent senators — still haven’t come out electronically from the FEC. (Senators insist on filing their reports on paper even though everyone else files electronically, so this usually explains the delay in getting electronic information — it has to be keyed in at your expense, taxpayer.) will update their congressional profiles as the data becomes available. Expect deeper analysis next month.