Cook County Board President Toni Preckwinkle and Ald. Brendan Reilly (42) are competing in the Democratic primary for board president. [Preckwinkle photo found on president's office social media | Reilly picture by Don Vincent/The Daily Line]

As downtown Chicago Ald. Brendan Reilly (42) makes a bid to unseat Cook County Board President Toni Preckwinkle in the upcoming March Democratic Party primary election, he has built an immense fundraising base to rival the longstanding county executive, who is seeking a fifth term in office.