Ald. Tom Tunney (44) grills Chicago Commission on Human Relations Comm. Nancy Andrade on a proposed measure to toughen the city’s sexual harassment rules.

A legislative push to firm up the city’s guardrails against workplace sexual harassment cleared a key committee hurdle in a unanimous vote on Wednesday, even as some aldermen — including the newest member of the City Council — aired reservations over the toll a punitive plank of the ordinance could take on businesses.