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.

Immigrants in Chicago and other U.S. cities have been preparing for immigration arrests since President-elect Donald Trump won the November election.

President-elect Donald Trump has promised to target immigrants with criminal records as he launches a "mass deportation" to remove millions of people from the country. In reality, the number of immigrants here illegally who have criminal records beyond immigration violations run into the hundreds of thousands – not millions.

Newly sworn-in U.S. President Donald Trump said on Monday that he would declare illegal immigration a national emergency, send troops to the U.S.-Mexico border, and reinstate his "remain in Mexico" policy as part of a sweeping immigration crackdown.