ACLU among more than 130 groups asking Congress for hearings on Trump immigration orders

Civil rights, religious groups sent letters to heads of oversight committees.

Grassley's office did not respond to ABC News' request for comment.

Joanne Lin, the ACLU's senior legislative counsel, said in a statement that Trump "unleashed his presidency with a series of executive orders on immigration that have devastated immigrant and refugee communities, provoked protests around the world and sparked several court battles. These orders are ripe with civil rights violations and riddled with constitutional red flags. The ACLU calls on Congress to conduct rigorous oversight over these executive orders."

In the letters, the groups said that if the committees fail to conduct oversight, they "will be giving free license to the Trump administration to pursue whatever policies it so chooses, even if those policies violate the Constitution, civil rights and civil liberties."

"This executive order responsibly provides a needed pause so we can carefully review how we screen people coming from these countries of concern," Attorney General Jeff Sessions said in announcing the new action.

But the ACLU contends that new executive action on refugees and immigration is, like the first, a "Muslim ban."

The letters from the groups also say that the two orders on border security and immigration, together with new Department of Homeland Security enforcement policies, expand state and local immigration powers without proper civil rights safeguards, implicate laws like eminent domain without justification and have the potential to "shred due process."