Pierce Miles-Parks

This suit filed by a group of Democratic states is the third to be filed challenging the executive order after the Democratic Party sued on Wednesday and a coalition of voting rights groups sued on Thursday.

The Constitution is explicit in delegating power to run voting to the states, although Congress can step in to set national rules for federal elections as well.

In a statement, New York Attorney General Letitia James referenced all that, saying, quote, Numerous legal experts said they expect courts to swiftly block this order, as they did with Trump's order last March, which tried to add new restrictions to voter registration.

Miles Parks, NPR News, Washington.