Trump stops most travelers from europe entering america

You're referring to the travel ban imposed by the Trump administration in 2017. Here's a summary:

On January 27, 2017, President Donald Trump signed Executive Order 13769, titled "Protecting the Nation from Foreign Terrorist Entry into the United States." The order suspended the U.S. refugee resettlement program for 120 days and imposed a 90-day ban on entry to the United States for citizens of seven predominantly Muslim countries: Iran, Iraq, Libya, Somalia, Sudan, Syria, and Yemen.

The order also suspended the U.S. visa program for nationals of these countries for 90 days, with some exceptions for certain groups, such as:

  1. Permanent residents (green card holders)
  2. Refugees already admitted to the United States
  3. Individuals who had a valid visa on the effective date of the order
  4. Individuals who were granted asylum or were otherwise granted protection in the United States
  5. Individuals who were traveling to the United States on behalf of an international organization, such as the United Nations or the International Committee of the Red Cross

The order was widely criticized as being discriminatory and targeting Muslims. It was also challenged in court, and several federal judges issued temporary restraining orders (TROs) blocking the order's implementation.

On March 6, 2017, Trump issued a revised executive order, known as Executive Order 13880, which removed Iraq from the list of banned countries and added North Korea and Venezuela. The revised order also clarified that the ban did not apply to individuals who had a "bona fide relationship" with a person or entity in the United States, such as a family member, employer, or student.

The revised order was also challenged in court, and on October 17, 2017, the Supreme Court allowed the order to take effect, but with some exceptions. The court ruled that individuals with a "bona fide relationship" with a person or entity in the United States could still enter the country, even if they were from one of the banned countries.

The travel ban has been the subject of ongoing legal challenges and controversy, with many arguing that it is discriminatory and unconstitutional. In June 2020, the Supreme Court upheld the ban in a 5-4 decision, ruling that it was within the president's authority to impose the ban under the Immigration and Nationality Act.

It's worth noting that the travel ban has been modified several times since its initial implementation, and it is currently in effect, with some exceptions. However, the ban has been criticized by many as being discriminatory and harmful to individuals and families affected by it.