By RACHEL KONRAD, Associated Press Writer As the Electoral College (news - web sites) prepares to certify President Bush (news - web sites)'s re-election on Monday, concerns persist about the integrity of the nation's voting system — particularly in Ohio, where details continue to emerge of technology failures, voter confusion and overcrowded polling stations in minority and poor neighborhoods. Photo AP Photo Few mainstream politicians dispute Bush's victory, and the incumbent's 3.5 million-vote margin nationwide was wider than any of the reported problems, which included insufficient or incomplete provisional ballots and, in some places, brazen partisan shenanigans.