Washington (CNN) President Donald Trump called a group of House Democrats "savages" -- language he has previously used for terrorists and gang members -- as Democrats begin revving up their impeachment inquiry into the President's actions regarding Ukraine.

In a tweet Saturday morning, Trump unleashed his new broadside against House Intelligence Committee Chair Adam Schiff and Judiciary Committee Chair Jerry Nadler. He also slammed the four freshman Democrats known as "the Squad" — Reps. Alexandria Ocasio-Cortez, Ilhan Omar, Ayanna Pressley, and Rashida Tlaib.

"Can you imagine if these Do Nothing Democrat Savages, people like Nadler, Schiff, AOC Plus 3, and many more, had a Republican Party who would have done to Obama what the Do Nothings are doing to me. Oh well, maybe next time!" Trump wrote

In the past, Trump has used the word "savages" in speeches and at campaign rallies to refer to the terrorist group ISIS and the violent gang MS-13.

The President also previously targeted the four progressive congresswomen of color with racist language, suggesting "they go back" to the countries from which they came, though three were born in the US and Omar is a naturalized US citizen. His comments led the Democratic-led House in July to approve a resolution condemning his remarks