There are many New Dealers/social democrats like Sanders running. Tim Canova in Miami and Fetterman as you say. Great, great men.
https://timcanova.com/ Zephyr Teachout is another candidate for Congress running on the same platform as Sanders being vehemently against big money influence in politics. All excellent choices for Congress. The Hillary crowd is the past. Her African American support is a one time occurance for such a candidate and the crowd over 65 are not the future either.
And the biggest rising star in the Democratic party is Tulsi Gabbard, who has endorsed Bernie Sanders. She will be hated hated for some time among the elderly top brass in the party but she is playing the long game. She sees where the future is. It is not a future where we let Wall Street control the economic policy, the military industrial complex control the foreign policy, big oil control the climate policy and the health care industry control our health care policy.