The order has already become the subject of five lawsuits by civil rights groups and Democratic attorneys general from 22 states.

A federal judge temporarily blocked President Trump’s executive order that aims to restrict automatic citizenship to babies born on U.S. soil, calling it “blatantly unconstitutional.” The order Mr. Trump signed on Monday was an effort to upend the nation’s immigration laws and reverse decades of precedent and would affect children born to undocumented or temporary immigrants.