The City Council will gather Wednesday for its March meeting, where aldermen are expected to approve an $8.5 billion expansion of O’Hare Airport (O2018-1124) that appears to have navigated through turbulence that greeted the deal hailed by Mayor Rahm Emanuel as a game changer for the airport. To get the eight-year effort off the ground, aldermen will also consider  O2018-1104) borrowing $4 billion, to be paid back with increased fees and rent paid by the airline.