Campaign officials are working to broaden Obama’s network of “bundlers,” the well-connected rainmakers tasked with soliciting big checks from wealthy donors, while seeking to preserve the aura of a grass-roots movement by luring back the kind of small Internet donations that helped shatter fundraising records four years ago.

To do so, Obama and his aides are leveraging every asset available to a sitting president — from access to top West Wing officials to a possible food tasting with the White House chef…

A key player in the closed-door donor recruitment is White House Chief of Staff William M. Daley, a former banking executive who has huddled in recent weeks over breakfasts and dinners with business leaders and Wall Street financiers in Chicago, New York and Washington — seeking to ease tensions over new financial regulations and other administration policies.