Since upsetting party-backed Rep. Mike Castle (R-Del.) in Delaware's GOP Senate primary Tuesday, Christine O'Donnell has raised nearly $2 million online. 

A source with knowledge of the campaign's online fundraising operation said that not only is the money is coming in as fast as it did for Sen. Scott Brown (R-Mass.) ahead of his special election, but that O'Donnell's raising money online at a pace that's two to three times faster than Sharron Angle in Nevada after her win in the primary. 

A week before his special election with Democrat Martha Coakley in Massachusetts, Brown raised $1.3 million online in a single day with some 16,000 individual donors. 

O'Donnell's campaign said Friday that it expects to surpass the $2 million mark sometime this weekend and said some 30,000 donors have given since her primary win Tuesday. 

O'Donnell's campaign is utilizing the same online fundraising team that led online efforts for Brown and is currently raising money for Angle--the Indiana-based Prosper Group. 

Democrats, meanwhile, are anticipating that the interest in O'Donnell's race will taper off as the general election nears with one strategist saying Friday he expects the focus to return to "more realistic opportunities" on the Senate side for Republicans.