The President made his way to Chicago on Thursday. Joe Biden was at a construction site run by a company that is mandating COVID vaccines for all workers or they will face regular testing.

Biden’s visit comes weeks ahead of an OSHA rule that will set vaccine and or testing requirements for employers of over 100 people. Biden says that the fourth wave of COVID infections is being driven by those who aren’t vaccinated.

Chicago is also home to United Airlines, who has a vaccination requirement for all their employees, United says only 1% of their 67,000 employees have failed to comply and risk termination.