The plans to build a mini-city along the North Branch of the Chicago River have been winding their way through the byzantine City Council process for the last year. The $6 billion project, known as Lincoln Yards, is one that Mayor Rahm Emanuel wants to lock in before he leaves office in May. But with the clock ticking, public money on the line, and a heated runoff election just weeks away, the development along the muddy riverfront is leading to a lot of political mudslinging at a pivotal moment in Chicago.

Reporting by Claudia Morell and Linda Lutton. Editing by Cate Cahan. Production by James Edwards and Becky Vevea.

Each week at On Background, WBEZ’s team of political reporters brings you the backstory on the week’s big story. Host Becky Vevea and guests take you inside the back rooms of Chicago and Illinois government to better understand the people, places and forces shaping today’s politics.