WI LBJ assassinated in April 1968?

So let's say that this occurred: what would happen? I think that Nixon still wins by a closer margin than OTL, and Humphrey might still have to endure a challenge. That is, if Gene doesn't put HHH over the top. Which would counteract the whole point of his campaign, which didn't have an electoral point anyway other than vote splitting.
 
Would Gene put HHH over the top? I'd say he holds his delegates, because he and RFK hate each other. Among other things: "I suppose now there'll be a planted story about an attempt on his life...".
 
To restate: LBJ is assassinated in April 1968. MLK is too. Will that generate a Dem sympathy vote, to the point of beating Nixon in November? Alternatively HHH is assassinated.
 
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