Immigrants from the targeted countries said the ban would upend their lives. “I don’t understand why the president has to target us nonstop,” one Haitian asylum seeker said.

The addition of visa overstays as a rationale could provide an opening for new legal challenges, migrant advocates say.

The Trump administration appears to have relied on a variety of considerations as it put together its latest restrictions.

Immigrants from the targeted countries said the ban would upend their lives. “I don’t understand why the president has to target us nonstop,” one Haitian asylum seeker said.

Seven of the 12 countries on President Trump’s new list are on the continent, where some said the policy was discriminatory and would unfairly affect their future.

Sick children, families and businesses are among the many people in Haiti, a country plagued by gang violence, likely to be hit hard by a U.S. travel ban.