SPRINGFIELD, Mass. (WWLP) - President-Elect Donald Trump's core campaign promise is the mass deportation of people who are in the country illegally. According to the Migration Policy Institute, this could impact more than 200,000 people living here in Massachusetts. "It's a very tough thing to do," Trump said. "But you have rules, laws, and regulations. They came in illegally." Incoming "Border Czar" Tom Homan is warning local governments not to intervene with the administration's deportation plans. "If they cross that line and knowingly harbor and conceal an illegal alien, well, I'm going to seek prosecution," said Homan. Here in Massachusetts, Governor Maura Healey was asked if she would comply if the Trump administration were to try to mobilize the state police to help with deportations. She said "absolutely not." Immigration drives US population growth to highest rate in 23 years as residents pass 340 million Northampton Mayor Gina Louise Sciarra agrees, "We will not go out of our way to ask about immigrant status and we will try to protect people as much as possible." A 2017 State Supreme Judicial Court ruling prevents Massachusetts police from arresting someone solely based on an immigration detainer. This is because immigration detainers are civil matters. Massachusetts law does not allow police to arrest someone for violating federal immigration laws without pending criminal charges. "ICE doesn't do blanket sweeps," said Todd Lyons, the Acting Assistant Director of Field Operations for Enforcement Removal Operations. "We don't do large-scale roundups. Every individual that's here today has come to our attention because they've been arrested by a local municipality for a felony or an egregious crime." Springfield Mayor Domenic Sarno told the 22News I-Team he does not want criminals on city streets, regardless of their immigration status. "Anyone that is an illegal migrant coming in that is involved with criminal activities, I'm going to treat them the same as I would residents or people in the city of Springfield," said Sarno. "I want them off my streets and out of my neighborhoods. But, we are not going to get involved in the mass deportations." In Massachusetts, an influx of migrants has put a strain on the government and the economy.Over the past year, over 10,000 families moved through the emergency shelter system - many of them undocumented immigrants. This has cost the state $1 billion this fiscal year alone. Mayor Sarno is hoping the new administration will help local cities and towns who have been left to front these costs. "There are costs for housing, schooling, and that trickles down to a city such as Springfield, and we are not getting any relief whatsoever," said Sarno. "The federal government created this problem, and then completely walked away from it." Local News Headlines Status of drought in western Massachusetts this December Hadley improv theater meets goal to build dream performance venue How these Massachusetts mayors react to threats of mass deportations Greenfield man to buy home for holidays with $1 million lottery ticket WWLP-22News, an NBC affiliate, began broadcasting in March 1953 to provide local news, network, syndicated, and local programming to western Massachusetts. Watch the 22News Digital Edition weekdays at 4 p.m. on WWLP.com.