As world leaders consider how to restart a crashing global economy, President Trump incorrectly claimed that he is the final arbiter on when the United States will reopen. “The authority is total,” Trump said during a sometimes hostile news conference — a comment that astounded legal scholars.

New York Gov. Andrew M. Cuomo (D) on Tuesday said there would be a “constitutional crisis” if Trump tried to exert federal power over the states.

Here are some significant developments:

Nearly 600,000 people have been infected by the virus in the United States, where the confirmed death toll is nearing 25,000.
The International Monetary Fund said the pandemic is causing the worst economic downturn since the Great Depression of the 1930s.
More than 2,100 U.S. cities are now bracing for budget shortfalls, with many planning cuts and layoffs, according to a new survey.
India extended the world’s largest lockdown until May 3, and Prime Minister Narendra Modi told the nation that the measures were helping to save lives.
In France, President Emmanuel Macron said a nationwide lockdown will remain in place until May 11, at which point restrictions will be partially lifted.