Rep. Steve Cohen (D-TN) turned his ire towards Rep. Jeff Van Drew (D-NJ) after it was revealed he will be switching political parties as a result of his stance on the impeachment inquiry into President Trump.

"I think Jeff Van Drew is making a serious mistake," Cohen told CNN. "I understand he feels he votes against impeachment, he'll lose in a Democratic primary — he could — but he got elected with Democratic votes under a Democratic banner, which he ran under for thirty years or so."

"And to turn and go to be a Republican is kinda strange, you know, I've heard rats jumping off a sinking ship, but very few jump onto a sinking ship," he continued, adding, "The lowest thing that there is in the Congress is somebody on the minority side who is a traitor to the majority. So this is not good for his district."

Van Drew was one of the two Democrats, thereby joining all of the House Republicans, who voted against the resolution that established the rules for the impeachment inquiry, arguing the rules were too slanted towards the Democratic majority.

"My district is red — a good chunk of it — and they're definitely anti-impeachment," Van Drew recently told NBC News. "And then I have the part that is purple, and they are more pro-impeachment. So whatever you do, you're going to aggravate people."

It was announced on Sunday five of Van Drew's congressional staffers resigned because of the party switch, writing in a letter they were "deeply saddened and disappointed by his decision."

Democratic presidential candidate Joe Biden called for people to donate to whichever Van Drew's Democratic opponent will be.

The leading Democrat opposed to impeachment is switching parties to protect Trump.



The best way to beat him is to give him a well funded opponent — and a strong campaign at the top of the ticket.



Pitch in to me and the Democrat who will face him: https://t.co/jIyOJ7WOi9 https://t.co/eUms5ByT1X — Joe Biden (@JoeBiden) December 15, 2019



