The president added that by "soon," he did not mean days or weeks. "I can assure the public that nothing improper took place."
U.S. Rep. Joe Sestak, D-Pa., defeated incumbent U.S. Sen. Arlen Specter, D-Pa., earlier this month in the Democratic senatorial primary in Pennsylvania.
Sestak has told reporters that the White House had offered him a job if he would withdraw from the race, but he refused. He also refused to make details public.
Meanwhile, congressional Republicans are calling for a special counsel to investigate the alleged job offer.