AHC/WI: IWW-CIO

Instead of reuniting with the moderate AFL, have the CIO merge with the militant IWW. What sort of circumstances would make this plausible (presumably a bigger IWW and a more militant CIO), and what would the long-term effects of this merger be (in particular how would it affect American labour's traditional conflict between craft and industrial unionism)?
 
By the 1920's "the I. W.W. was no more than a shell of its old self and only eleven delegates attended its 1925 convention" https://books.google.com/books?id=SlRc3KqcDygC&pg=PA150

Really, to have an IWW so powerful that the CIO would merge with it--and a CIO so radical in the 1950's that it would want such a merger (remember that in OTL the CIO had kicked out its pro-Communist left-wing unions by the time the decade started) you just have to have US history so completely different that the question is almost meaningless. The CIO as we know it would probably never have come into existence in such an alternate US.
 
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