Travel laws and regulations

President Donald Trump speaks about the coronavirus in the James Brady Press Briefing Room of the White House, Monday, April 20, 2020, in Washington. (AP Photo/Alex Brandon)

President Donald Trump speaks during a press briefing with the coronavirus task force, in the Brady press briefing room at the White House, Monday, March 16, 2020, in Washington. (AP Photo/Evan Vucci)

Andre of Washington, D.C., rides the escalator up at the Metro subway Congress Heights train station in Washington, Friday, March, 13, 2020. He wears two face masks and gloves to protect his children and grandchildren from the coronavirus. He doesn't want to bring it home. (AP Photo/Carolyn Kaster)

A couple kiss, at the Barcelona airport, Spain, Thursday, March 12, 2020. President Donald Trump, who had downplayed the coronavirus for weeks, suddenly struck a different tone, announcing strict rules on restricting travel from much of Europe to begin this weekend. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (AP Photo/Emilio Morenatti)

Trader Michael Gallucci works at his post on the floor of the New York Stock Exchange, Wednesday, March 11, 2020. Stocks are closing sharply lower on Wall Street, erasing more than 1,400 points from the Dow industrials, as investors wait for a more aggressive response from the U.S. government to economic fallout from the coronavirus. (AP Photo/Richard Drew)

President Donald Trump speaks in an address to the nation from the Oval Office at the White House about the coronavirus Wednesday, March, 11, 2020, in Washington. (Doug Mills/The New York Times via AP, Pool)

A worker from a Servpro disaster recovery team wearing a protective suit and respirator peers out a window as he waits to exit the Life Care Center in Kirkland, Wash. for a break from cleaning the facility, Wednesday, March 11, 2020. The nursing home is at the center of the coronavirus outbreak in Washington state. For most people, the virus causes only mild or moderate symptoms. For some it can cause more severe illness, especially in older adults and people with existing health problems. (AP Photo/Ted S. Warren)

People walk in an almost empty St. Mark's Square in Venice, Italy, Monday, March 9, 2020. Italian Premier Giuseppe Conte says he is restricting travel  nationwide to try to stop the spread of the new coronavirus. Conte said Monday night a new government decree will require all people in Italy to demonstrate they need to work, have health conditions or other limited legitimate reasons to travel outside their home areas. (Anteo Marinoni/LaPresse via AP)

President Donald Trump speaks in the press briefing room at the White House, Saturday, Feb. 29, 2020, in Washington. (AP Photo/Andrew Harnik)

FILE- In this Feb. 19, 2020, file photo, a monkey sits on a hoarding welcoming U.S. President Donald Trump ahead of his visit to Ahmedabad, India. A festive mood has enveloped Ahmedabad in India’s northwestern state of Gujarat ahead of Prime Minister Narendra Modi's meeting Monday with U.S. President Donald Trump, whom he's promised millions of adoring fans. The rally in Modi's home state may help replace his association with deadly anti-Muslim riots in 2002 that landed him with a U.S. travel ban. It may also distract Indians, at least temporarily, from a slumping economy and ongoing protests over a citizenship law that excludes Muslims, but also risks reopening old wounds. (AP Photo/Ajit Solanki, File)