Bernie came close when? Hillary closed up the nomination faster than Obama and Biden cleared it in record time.
The problem is with the democrats nomination process and rules allow for, as @TreeFrogTrader would say, a fly stay around your potato salad longer than it should. The republicans actually have a better process. As the primaries move on they move to winner take all while Dems continue to split delegates.
Democrats are evaluating their nomination process currently. Moving away from NH and Iowa and punishing caucus states with later dates too.
Bernie came close to being relevant but faded real fast. Tony claims the progressives control the party but I see a lot of evidence to the contrary in that they have little say on who their party nominates.
I dont think progressives staying home lost the election for Hillary.... she did a good job of that all by herself losing MI/WI/PA by ignoring them completely. Independent candidate took voters from her and she lost. Her failure 1000%.
Biden won because all those voters who thought "Hillary got this" got scared after 4 years of trump and came out in large numbers. BOTH trump and biden got record number of votes so the entire election was energized.
Progressives can sit home in 2024 if they want but if GOP wins no one wants to hear from the whiniest wing of the dem party.