Roland Burris took his place as Barack Obama's successor in the U.S. Senate on Thursday, ending a standoff that embarrassed the president-elect and fellow Democrats who initially resisted the appointment by impeached Illinois Gov. Rod Blagojevich.

"I do," Burris said with a grin as Vice-President Dick Cheney administered the oath of office to the former Illinois attorney general who takes Obama's place.

He takes his Senate seat alongside fellow Democrats who initially turned him away, and who had vowed not to seat anyone appointed by Blagojevich.

The governor is accused of trying to sell the Senate seat that had been held by Obama.

Burris is now being given a polite welcome by Democrats, who say they never had anything against him personally.

Burris becomes the only black member of the Senate.