Mayor Rahm Emanuel raked in $112,500 in campaign donations in just one day this month -- thanks, in large part, to two trade unions and heavyweights in the entertainment industry, where his brother, Hollywood super-agent Ari Emanuel, wields huge influence.

The new wave of contributions includes: $30,400 from the Ironworkers Political Action League and $15,000 from the Bricklayers and Allied Craftworkers PAC. Both unions stand to benefit from the bonanza of jobs and contracts tied to Emanuel's proposed, $8.5 billon O'Hare Airport expansion project.

In 2015, Emanuel survived Chicago's first mayoral runoff -- but only after spending a record $24 million, four times more than County Commissioner Jesus "Chuy" Garcia, a relative political unknown.

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