The revelation that Link was wearing a wire for the FBI sent ripples through the state’s political landscape, already rattled by wide-ranging public corruptions investigations. Beginning with charges against the powerful Chicago 14th Ward Ald. Edward Burke and the disclosure that former 25th Ward Ald. Danny Solis was wearing a wire from other branches of the federal probe, the federal investigations have sprawled beyond the city limits to include search warrants and subpoenas served to a state lawmaker’s office, as well as suburban village halls, politically connected industries such as road building and gambling, and close advisers to House Speaker Michael Madigan.