A public hearing on legislation that would alter collective bargaining rights for Iowa’s public employees, and a rally to protest the bill, will be broadcast live online by the state Senate Democrats. The event will be livestreamed at www.senate.iowa.gov/democrats starting at 4 p.m. At 5 p.m., Democratic staff will livestream a pro-labor union rally on the first floor of the rotunda, and will switch to the hearing at 6 p.m