Chicago Ald. Patrick Daley Thompson, related to both Mayor Daleys, faces federal charges stating he filed false tax returns and lied about $219,000 in payments from a neighborhood bank. Over 30 Chicago aldermen have been convicted or charged with corruption.

The Democratic nominee in the Cook County assessor’s race is voicing support for a ban on city aldermen doubling as property tax appeals attorneys, an arrangement that encourages conflicts of interest.