AHC: Party system if Plessy upheld

How would the party system develop if Plessy v. Ferguson was upheld by SCOTUS? Using a POD where Garner becomes President after FDR's assassination, say 1935.
 
Pre-Southern Strategy party system may still be the same as pre-1960s, if there aren't any angry Southerns for Nixon to pick up for the Republican party.

Don't feel like Plessy v Ferguson can stay around forever though, so maybe Republicans become the ones to appeal to the Black voters if the Democrats stick to their white-southern base?
 
Is it really very plausible that Plessy would be upheld in 1954, even if, say, Vinson had lived? See https://groups.google.com/d/msg/soc.history.what-if/JvwCwdlL07c/QCwBBdvaEo8J for why I would answer No. Even if I am wrong about this, Vinson wouldn't live forever, Robert H. Jackson would soon die, and Stanley Reed--the last justice to yield on *Brown* in OTL-- would retire by 1957. (Personally I doubt that Jackson or even Vinson would vote to uphold segregation anyway, for the reasons I indicate in that post.)

In short, it is really hard for me to see *Plessy* lasting through the 1950's in any event.
 

Gaius Julius Magnus

Gone Fishin'
Democrats maybe remain a more overall conservative populist party and both parties continue to have liberal and conservative wings in them.
 
That's why I said a different SCOTUS ITTL under President Garner.

Obviously, that depends on how long Garner serves, who succeeds him in the presidency, etc. If we have a succession of conservative Democratic administrations--which I really doubt, since they will have limited appeal outside the South--then the party system *already* has sharply diverged from that of OTL long before OTL's *Brown* decision. For one thing, the black vote will be solidly Republican, and as more and more blacks move into the electoral-vote-rich northern states, this will be an increasing problem for the Democrats.
 
Not a succession of Dixiecrats. If Garner wins in 1936 and 1940, succeeded by Dewey (or a moderate Northern Dem) in 1944, then he'll have filled 5 (maybe 6?) slots. Dems say "we won, move along" with their GOP allies.
 
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