but it all boils down to the stark differences here. the biden administration is looking at how many people have been killed by this virus. but the businesses and the republican-led states say will cost millions of dollars in compliance costs and they fear it will lead to labor shortages because workers won't want to comply and quit their jobs. that is what the supreme court will have to grapple with today in oral arguments. . >> it will be fascinating to see what they ultimately decide. ariane, thank you for that. emergency rooms in massachusetts are maxed out as the omicron variant surges there. members of the national guard fanning out to provide much needed help to dozens of understaffed and overwhelmed hospitals. cnn's oren liebermann live with the latest on this. oren. >> reporter: john, days before we entered umass hospital, the main hospital in that region,