There are growing signs of a political showdown some fear could threaten the start of the school year for many districts. Gov. Bruce Rauner is calling on the Illinois Senate to send the Democrat's school funding bill to his desk.

He is pledging to then use his amendatory veto power to strip money for Chicago teacher pensions from the school funding bill.

Democratic state Sen. Andy Manar says that could effectively kill the measure, putting hundreds of districts at risk of shuttering schools. Lawmakers approved a state budget this month that requires school funding be distributed through a new school funding formula laid out in Senate Bill One.