As someone who
1. Supported Bernie in 2016 and am 100% convinced he would have easily beaten Trump then
2. Canvassed for Bernie in 2020 and am moderately confident he would have narrowly beaten Trump
3. Likes his policies and policies to his left
Nah. Things have changed now. The US has moved to the right, quite decisively. AOC at one point spoke of open borders or abolish ICE. That makes her dead on arrival. Bernie, who has been less left-wing than her on immigration, is also DOA. In general, the space for left-wing populism opened in 2008 and closed sometime between 2017 and 2022.
Bernie's key to victory against Trump was his popularity with blue-collar whites (Trump's base) and Latinos (who have swung to Trump in both 2020 and 2024). 8 years of culture war and political polarisation has made these votes extremely difficult for any Dem, including left-wing populists. They might have been floating or gettable but are very likely set in the MAGA party now. AOC never had Bernie's appeal with rural whites, and this election should show that minority-minority appeal is a myth - she has no inbuilt advantage with Latinos at all (quite the opposite IMO). More than that, she shares Bernie's weakness with suburban whites (who were the key for Biden's win). Basically, she all downside, no upside.
2028 Dems have limited chances in the suburbs and with some blue collar workers (white and Latino). The Nebraska independent senate candidate who outperformed Kamala by >10% is a possible type, but will have trouble winning a primary that requires college white voters and black voters. The safest option is a white male moderate, and hope that Trump has turned off enough suburban or Latino voters for next time. 2020 repeat.
Of course, there might be a fundamental shift in these next 4 years that makes all this meaningless, but, unless it's something like climate change becoming an issue, or people suddenly discovering human brotherhood about immigration, I don't see it helping a left candidate. If it's significant inflation caused by tariffs, I can see President Shapiro or Newsom in 2028.
Reading hearing podcasts about history, there are moments not taken that never come back. For some Marxists, we are essentially in an incomprehensible or fallen world since 1914, when the social-democrats of each European country betrayed their class, stayed loyal to their country, and supported the war. Everything, even the Bolshevik revolution, is in the sbadow of that un-washable tainted act.
For modern social democracy, that moment may have been Bernie 2016. It could have led to the kind of political realignments that actually generated a stable majority for a left-liberal party. But that perfect storm of circumstances is (IMO of course) lost for a generation now.