President Trump's new ban on travel to the U.S. by citizens from 12 mainly African and Middle Eastern countries has taken effect amid rising tension over the president's escalating campaign of immigration enforcement.

The policy takes effect Monday at 12:01 a.m. and does not have an end date. Here’s what to know about the new rules: How Trump justified the ban . Since returning to the White H

Trump has justified the bans by citing security risks, including a recent incident in Colorado involving an Egyptian national, although Egypt is not on the banned list.