The state’s largest teachers union filed a legal challenge contesting how lawmakers “log rolled” a series of education issues—including an expansion of a controversial school vouchers program—into a single bill that passed in the waning hours of the 2014 legislative session.

The Florida Education Association, a longtime opponent of voucher programs, filed a complaint in the Second Judicial Circuit in Leon County that challenges the constitutionality of how legislators patched together legislation into a wide-ranging education bill (SB 850). The voucher expansion had appeared dead in the Senate until getting approved in the broader bill.