The United States reported a record of more than 500,000 new cases over the past week, as states and cities resorted to stricter new measures to contain the virus that is raging across the country, especially the American heartland. The record was broken Tuesday, even as the Trump administration announced what it called its first-term scientific accomplishments, in a press release that included “ENDING THE COVID-19 PANDEMIC” written in bold, capital letters. Twenty-nine states reported their highest day of coronavirus cases since the pandemic began.