President Trump on Wednesday excoriated so-called “Never-Trump Republicans” as “human scum” as he seeks to solidify Republican support of him amid an ongoing impeachment inquiry.

“The Never Trumper Republicans, though on respirators with not many left, are in certain ways worse and more dangerous for our Country than the Do Nothing Democrats,” Trump tweeted. “Watch out for them, they are human scum!”

It’s unclear what led to the president to target Republicans who are critical of him, though Trump may have been lashing out at career government officials who are part of his administration and have cooperated in recent days with the impeachment inquiry.

Read more at The Hill.