Amanda Hernández | (TNS) Stateline.org Former President Donald Trump has repeatedly promised to launch what he calls the “largest deportation program in American history” if reelected, targeting immigrants living in the United States without documentation — people whom he described in a rally this week as “vicious and bloodthirsty criminals.” “I will rescue every city and town that has been invaded and conquered,” Trump pledged during the rally at New York City’s Madison Square Garden. By law, immigration is a federal matter, and Trump has said he’ll federalize state National Guard troops, activate the military and build detention camps. But experts and close Trump affiliates say state and local actions could affect any mass deportation program he might attempt.