IOWA CITY — Iowa’s public universities for years have touted the billions they bring to the state through research and innovation; student, visitor and alumni spending; new jobs; and inbound migration — citing those boons in seeking improved state support. But the Legislature has continued to cut appropriations and, with campus leaders again re-upping pleas for more money, GOP lawmakers this session are seeking more evidence and oversight of the Board of Regents’ boasts through proposed legislation.