Coronavirus updates:
—Dr. Anthony Fauci, a top U.S. health official, said that a regional lockdown of parts of the U.S. could become necessary.
—He recommended that those at greatest risk — the elderly and those with health conditions — abstain from travel.

President Trump hosted President Jair Bolsonaro of Brazil at his Florida estate on Saturday but refused to rule out steel and iron tariffs that have created tension in the relationship between the countries.