Despite a pledge not to take money from lobbyists, President Obama  has relied on prominent supporters who are active in the lobbying industry to raise millions of dollars for his re-election bid.

At least 15 of Mr. Obama’s “bundlers” — supporters who contribute their own money to his campaign and solicit it from others — are involved in lobbying for Washington consulting shops or private companies. They have raised more than $5 million so far for the campaign.

Because the bundlers are not registered as lobbyists with the Senate, the Obama campaign has managed to avoid running afoul of its self-imposed ban on taking money from lobbyists.