Darthbobber
I’m reasonably sure, given their history, that there are at least a half dozen democratic Senators who would bloc with Manchin if push came to shove. Since he suffices as a public stumbling block and is willing to be vocal, they presently are happy to hide in his shadow.
Jen
Shaheen has a propensity to make a few progressive noises when she feels the winds shifting. She made a great show of palling around with Warren and Sherrod Brown in 2014. Co-sponsored Bernie’s Medicare for all bill in 2017.
I’m not sure how she would bloc on this one if she’s called out into the open on it.