State and local leaders across the country are bracing for a tidal wave of aggressive immigration policies and possible mass deportations that President Donald Trump has vowed to enact in the hours and days following his inauguration Monday.

Mr. Trump is planning to attempt to deny birthright citizenship to the children of immigrants who are in the U.S. illegally, according to the incoming officials. The U.S. government has long interpreted the U.S. Constitution to mean that those born on American soil are citizens at birth, regardless of their parents' immigration status.

Among his first actions back in office, Trump declared a national emergency at the border, which will free up military funding to build more sections of a border wall, support operations to stop border crossings, and send troops to the southern border to, as he said in his Inaugural Address, “repel the disastrous invasion of our country.”