State Attorney General William Tong joined New York and Vermont lawmakers Wednesday to sue the Trump administration, calling planned changes to rules for immigrants hoping to become U.S. citizens “unfair.”

The “Public Charge Rule” change includes denial of a green card and possible deportation for people who relied on public assistance programs, like food stamps, for 12 months in the past three years.

Tong says at least 200,000 Connecticut residents could be impacted by the change.

He also announced he would likely join a separate suit against a plan that could lift limits to the amount of time children could be held in immigration detention.