The latest iteration of the ban will suspend immigrant visas for citizens from four countries: Nigeria, Myanmar, Eritrea and Kyrgyzstan. And it would bar people from Sudan and Tanzania from the U.S. diversity visa program, which awards green cards to immigrants.

NOTE: Although Myanmar is a Buddhist-majority country, most of the people trying to leave now are Muslims, having been driven out by the Buddhists because of their excessive violence against the native population.

NEWSY Acting Department of Homeland Security Secretary Chad Wolf says the U.S. will block diversity visas from Sudan and Tanzania and all immigrant visas from Eritrea, Kyrgyzstan, Myanmar, Nigeria. Non-immigrant visas, which are usually for visiting the U.S., will not be covered under the new restrictions.

“Sudan is a vastly Muslim-majority country [and] the other countries do have significant Muslim populations,” said Farhana Khera, president and executive director of Muslim Advocates. “So the brunt of this ban will still be primarily borne by Muslim populations.”

Wolf blamed issues with poor technology, plus a lack of sharing information about terrorism. “These countries, for the most part, want to be helpful but … simply failed to meet those minimum requirements that we laid out,” he said.

Restricting immigrant visas for people from certain countries was a campaign pledge for the president. A week into his presidency, he imposed significant travel restrictions, which before today included citizens of six countries — Iran, Yemen, Syria, Somalia, Libya and North Korea — as well as certain government officials from Venezuela.

The largest group of people impacted by this expanded policy will likely be Africans.