Hard bargaining on a deal for Reggie Bush will begin on Thursday, ESPN.com has learned, as Saints officials and agent Joel Segal are scheduled to engage in what almost certainly will be the most substantive negotiations yet on a contract for the second overall choice in the draft. The negotiating session, expected to be conducted by phone, comes on the day when Saints players are to report to training camp at Millsaps College near Jackson, Miss. The initial practice under first-year coach Sean Payton is on Friday, and it will take a monumental breakthrough in the Thursday bargaining to get the 2005 Heisman Trophy winner onto the field for that workout.