Several U.S. Midwest states reported record one-day increases in the number of new coronavirus cases on Thursday as nationwide deaths from the virus topped 180,000 and officials braced for the possibility of another surge with school openings. Meanwhile, the governors of several states said they would not reduce testing as recommended the U.S. CDC, a change many health officials say was based on political pressure and not science. Iowa, Minnesota, North Dakota and South Dakota all recorded on Thursday the biggest one-day increases in new infections since the pandemic started.