It's about getting 50%+1 in a democracy, right (or at least it should be)? So at some point the choices should come down to a binary to guarantee a 50%+1 outcome. However, the right candidate in a representative democracy and building of that 50%+1 should be done either with rank choiced voting or 2 round elections (either with a primary as we do it now or with multiple parties in the first round, that winnows everything down to 2 candidates). And an important role of the primaries is to get the resulting candidate to negotiate and build a coalition unifying the the 50%+1 coalition. So that deal that Biden and Sanders struck after Biden won the primary was huge. In the case of the left, the primary helps move the winning candidate left of where they might otherwise be. It's why I was ecstatic to have Bernie run in 2016 and 2020 (It puled Hilary Clinton and Joe Biden to the left). And I think it's bullshit that the Democratic party puts its thumb on the scale.
So if you have a left-right linear spectrum constituting 100% of the electorate, there are obviously different 50%+1 coalitions that can be made. Joe Manchin or Conor Lamb wants to be at the center of that 50%+1 coalition. Progressives obviously have an anathema to that and want that 50%+1 coalition to include everyone from the left end of the spectrum to the right of that up to 50%+1. Unfortunately, with institutions like the Senate and electoral college and whatnot, getting that 50%+1 coalition requires building it with Joe Manchin or Conor Lamb. Otherwise, there is no majority.
So while we fixate on Biden and whatnot, Biden and us need to focus on local elections, local referendums, and creating a Manchin-Sinema-Conor Lamb (or his equivalent) proof majority in the House and Senate. It's obvious to me with several of Biden's moves, he's highly responsive to popular will and the votes available, regardless of what his own or his donors' proclivities are. So if we want paid family leave and assistance with early child care and a pathway to medicare for all and expanded child tax credit, we need to be focused on winning all of these more local elections. Yes, having a popular candidate at the top of the ballot would help, but if you look at Biden's polling, it's the left end of the spectrum that's keeping him from being closer to 50% popularity. Instead of getting angry that we didn't get all this stuff when Manchin scuttled everything, we should be focused on building majorities that don't need him.
If John Fetterman hadn't had the stroke and the resulting depression, I'd be ecstatic about having him run for the presidency. Hopefully, he'll recover by and be in good shape by 2028. We need a blue collar - union friendly presidential candidate to unify and build that 50%+1 coalition. I was hoping it was Sherrod Brown in Ohio in 2016 and 2020, but he voted against the Rail Worker strike and I think it's taking its toll on his Senate election chances in Ohio.