By MONIKA PRONCZUK

DAKAR, Senegal (AP) — Citing national security concerns, President Donald Trump on Wednesday banned citizens of 12 countries , primarily in Africa and the Middle East, from entering the United States and restricted access for citizens of seven other nations, resurrecting and expanding a hallmark policy of his first term.

The travel ban applies to citizens of Afghanistan, Myanmar, Chad, the Republic of Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen.

The policy change also restricts entry for citizens of Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela who are outside the U.S. and do not hold a valid visa.

It takes effect Monday at 12:01 a.m. and does not have an end date.

Here’s what to know about the new rules:

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