From the Washington Post:

Democratic political committees have seen a decline in their fundraising fortunes this year, a result of complacency among their rank-and-file donors and a de facto boycott by many of their wealthiest givers, who have been put off by the party’s harsh rhetoric about big business.
The trend is a marked reversal from recent history, in which Democrats have erased the GOP’s long-standing fundraising advantage. In the first six months of 2009, Democratic campaign committees’ receipts have dropped compared with the same period two years earlier.
The vast majority of those declines were accounted for by the absence of large donors who, strategists say, have shut their checkbooks in part because Democrats have heightened their attacks on the conduct of major financial firms and set their sights on rewriting the laws that regulate their behavior.

From USA Today:

Despite being in the minority in Congress, Republican campaign committees outraised Democrats by $1.7 million in August as they have aggressively collected political cash amid the rancorous debate over health care.
Republicans also held an edge over Democrats in the amount of money available, when counting debts, as both parties set the stage for the 2010 elections, in which more than three dozen competitive House and Senate seats are at stake.
The GOP spike is a departure. In each of the past four years, the party in power — whether Democrat or Republican — raised more than the minority’s fundraising committees in August, a USA TODAY review of campaign records shows.