Lawmakers in the District of Columbia routinely approved lucrative city contracts for businesses that made hefty campaign contributions at the time of the contract vote. That was one of the most eye-opening findings of a months-long investigation by WAMU and the Investigative Reporting Workshop at American University. It's a power unique among state legislatures in the country; every contract worth a million dollars or more must be approved by the 13-member council. There was little oversight of this process until reporter Patrick Madden and students from the Workshop started delving into these contracts. The team analyzed nearly a decade worth of public records — and over 100,000 campaign contributions — to find out which companies were winning contracts and how much campaign cash they gave to the council members approving their contracts.