Yes, he is, and so are the other sponsors of this diseased bowel movement of a bill....but how many conservative Democrats will use this bill as a negotiating tool to get Tlaib and Omar tossed from the House, or at least their committees?
Well, the group Democratic Members for Israel (DMfI) has been openly shopping for someone to run against Omar and Tlaib for the next political cycle; and Tlaib herself has been ripped by conservative Dems like Josh Gottenheimer for her defense of her people (not just Palestinians in general, since Tlaib has actual family living in the Occupied Territories.)
So, it is out there.
To the majority of Democrats' credit, they have stood by her strong so far.