The White House says Sen. Roland Burris needs to tell Illinois constituents the extent of his involvement with the administration of disgraced Gov. Rod Blagojevich.
White House spokesman Robert Gibbs says Illinois residents deserve to know how Burris came to be appointed to the U.S. Senate seat formerly held by Barack Obama.
Burris, a Democrat, says he will cooperate with a new investigation into his contacts with Blagojevich's administration. Blagojevich is accused to trying to sell Obama's seat to the highest bidder.
The former governor's brother asked Burris for fundraising help, but Burris insists that he never raised money for Blagojevich while the governor considered possible Senate replacements.