The Democratic Party—while and after getting rid of their old guard and antiquated establishment careerists—should target the entire nation with a modern New Deal-type party. By doing that, they would not be limited in being designed to merely carry up to 30 states and District of Columbia with winning presidential elections.
As a rather good journalist on Twitter (who I can't remember pointed out) the New Deal stopped legislating in 1938; lost it's majority in 1946 and then got destroyed in 1952.
To a much lesser degree the Obama Coalition was like the New Deal- based around one figure
