It’s a peculiar situation with Warren and I think Sommer is closer to the truth than Adjica but I’ll add the shift in fortunes happened when EW took onboard Hillary and Kamala staffers, made a U-turn on Sanders and went for him the same way Hillary does – with manufactured and baseless accusations. That goes down poorly with people in general and EW took a well-deserved nosedive in popularity ever since.
I imagine the practical stance against EW health proposal is that given how hard Obama had to fight to get the ACA passed, making the next reform two fights instead of one, and only three years apart is just making it harder on yourself.
My more cynical take is that Warren is just not serious on what has become the most pressing issue of the elections. M4A saves Americans money, anxiety and hassle and is only a threat to the insurance industry, the pharmaceutical industry and those on their bribes and donations. For Warren to step back and propose something that is not only impractical but likely even harder to fight for in step two, is just a thinly veiled concession to the very corporate interests she supposedly wants to fight – and in honest, credit where credit is due, has fought with some success before now.
EW would do well to accept she made a big mistake, step back and endorse Sanders and hope for a VP position. But it’s not going to happen and in the grand scheme I think it’s a blessing to the Sanders campaign because EW also has a lot of bad baggage of practically being untruthful about her ancestry and on applications and about her children’s public schooling etc. It’s a long list of “whiteish” and ridiculous lies. Things Trump already has used against her and would further discredit her on when she argues his lies. She’s book smart and means well but too weak to be president. She shot, she missed, and that’s hopefully the end of that for her.