NASHVILLE (AP) — President Obama is scheduled to give a speech in Nashville discussing his recent executive action on immigration.

Obama has said the action that could shield 4 million people from deportation was necessary in light of inaction by Congress. Opponents have called the move unconstitutional and vowed to stop it.

Obama will speak on Tuesday at a Nashville community center and hub of immigrant-related nonprofit organizations called Casa Azafran.

One of those nonprofits is Conexion Americas, whose executive director, Renata Soto, met with Obama in January to discuss immigration reform. Soto said the center is honored to host the president and serve as the venue for a national conversation about immigration.