Donations to Obama campaign include some biggies

Obama aides emphasized that the average donation to his campaign in June -- during which he brought in $52 million -- was $68. Over the course of his campaign, the presumed Democratic presidential nominee has raised $340 million. By law, an individual can give no more than $2,300 to a candidate for the primary and $2,300 for the general election.

Obama has established joint fundraising agreements with the Democratic National Committee and two other party committees. Those entities can raise larger sums and spend unlimited amounts on behalf of individual candidates.

Of the $20.3 million Obama's joint fundraising committees amassed in June, 86%, or $17.6 million, came in chunks of $5,000 or more and 64% came in increments of $28,500 or more, campaign finance reports filed over the weekend show.

Frank Clark, head of Commonwealth Edison, which supplies electricity to Chicago, gave $2,300 to Obama early in the campaign and $28,500 last month to the Democratic White House Victory Fund.

John Rogers, founder of the Chicago investment house Ariel Capital, also gave the maximum to Obama's presidential account, and $13,000 to Democratic White House Victory.

According to the campaign, Clark and Rogers are among Obama's largest fundraisers, each having raised more than $200,000 from friends and associates.

Employees at Exelon, the parent company of Commonwealth Edison, have given more than $180,000.

Obama spokesman Ben LaBolt noted that the campaign, unlike the Democratic Party and the fundraising committees, has tapped small donors, raising the bulk of its money in increments of less than $90.

Michael J. Malbin, executive director of the nonpartisan Campaign Finance Institute, said that although Obama had raised an unprecedented $165 million from those who donated in increments of less than $200, "he cannot raise $150 million or whatever his budget says he needs without going to large contributors."

The presumptive Republican nominee, John McCain, also has joint fundraising committees and will probably rely heavily on them in the fall.

Such committees appeal to candidates and donors because contributors can write a single check and have it split among the candidate, the party and related committees.