Sixteen states and the District of Columbia are suing the Trump administration over what they charge is a coordinated federal effort to intimidate health care providers into stopping gender-affirming care for individuals under age 19.

A coalition of Democratic state attorneys general sued the Trump administration on Friday over President Donald Trump’s effort to use the Department of Justice to go after medical professionals who provide gender identity care to trans youth and 18-year-olds.

Officials in 16 states and Washington, D.C., filed a lawsuit Friday to block the Trump administration’s investigations into hospitals and doctors who provide transition-related care to minors