The Republican National Committee raised about $8.2 million in August, far outpacing its Democratic rival in a typically slow fundraising month.
The Democratic National Committee reported that it raised $5.4 million last month, including $1.4 million for the Obama Victory Fund, a joint fundraising account by the DNC and Obama's campaign.
The DNC finished the month with $16.6 million in cash and $11.1 million in debt.
The RNC ended August with $9.3 million in cash and $15.9 million in debt. Republicans said it was the largest amount of money the RNC has raised during the month of August in a non-election year.
August is usually a difficult month for fundraising because many donors are on vacation and events are limited.