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.

The Trump administration announced in a proclamation on Wednesday that it will ban nationals from Haiti from entering the United States and partially limit Cubans and Venezuelans from coming into the country.

U.S. Rep. Mike Lawler, a fellow Republican, urged the Trump administration to reverse its decision. Lawler's 17th District includes Spring Valley, home to the second-largest Haitian diaspora, per capita, in the U.S.