Sirota lays out detail thinking that progressives have muscle to flex, if they have a will to stand on principle. A big "if"?
How about another big "if" - If they don't do it now, when would be a better opportunity? The answer is - the sooner, the better.
Biden gets no bill unless he gets one with something for those most in need. Harris can overrule the parliamentarian's rule interpretation. She needs fire to the feet, wherever, to get her to notice and act.
Will progressives stand on principle, against Manchin-mode, or will Biden remain free to use Manchin every time something arises he does not really care to do, but wants the killer to be somebody besides himself. Besides Harris.
Progressives have to do more than writing letters. Showing courage is not difficult. Sincere courage would be a welcome interlude from DC, as usual.