WASHINGTON — Governments of 12 countries whose citizens will be banned from visiting the United States beginning next week scrambled Thursday to understand President Donald Trump’s latest move to resurrect a hallmark policy of his first term.

The ban that Trump announced Wednesday takes effect at 12:01 a.m. Monday, a cushion that may avoid the chaos that unfolded at airports nationwide when a similar measure took effect with virtually no notice in 2017. Trump, who signaled plans for a new ban upon taking office again in January, appears to be on firmer ground this time after the Supreme Court sided with him.

Some of the 12 countries also appeared on the list of banned countries in the Republican president’s first term. The new ban targets Afghanistan, Myanmar, Chad, the Republic of Congo

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