President Donald Trump's new ban on travel to the U.S. by citizens from 12 mainly African and Middle Eastern countries is set to take effect Monday amid escalating tension over the president's unprecedented campaign of immigration enforcement.

Houston travelers shouldn't experience delays as a result of President Donald Trump's wide-ranging travel ban that starts early Monday, a Houston Airport System spokesperson said. Trump announced Wednesday the ban would affect citizens of Afghanistan,

U.S. President Donald Trump's order banning citizens of 12 countries from entering the United States goes into effect at 12:01 am ET (0401 GMT) on Monday, a move the president promulgated to protect the country from "foreign terrorists.