I looked them over. Page 10 on NBC says a lot.
It reveals that Americans really don't like any of these candidates much.
No candidates, nor SCOTUS enjoy an overall (Very and Somewhat) Positive Differential.
Kennedy and West come the closest, but that could be because they remain largely unfamiliar.
Differentials: Kennedy (-1), West (-3), SCOTUS (-12), Trump (-14), Manchin (-14), Haley (-15), Biden (-18), Harris (-25)
% "Don't Know" + "Neutral": West (77), Manchin (64), Kennedy (45), SCOTUS (32), Haley (39), Harris (19), Biden (10), Trump (10)
What we could do here is expand the "Neutral + Don't Know" numbers by the differential.
If that happens, Kennedy is the most favorable by a wide margin.
West comes next, then Manchin. (this could be important), although West's unfamiliarity is prohibitive.
Harris is hurting Biden. That is definite. Voters are 81% decided on her, and she has the worst negative differential.
Over to the CNN poll for the same items:
Differentials: Haley (-7), Trump (-16), Harris (-23), Biden (-25)
% "Don't Know" + "Neutral/No Opinion": Haley (42), Harris (19), Biden (7), Trump (6)
CNN Poll does not include Kennedy, Manchin, or West as candidates, but does have opinions on Kennedy.
Let's look at opinions on Kennedy. This is done by the question about how would you feel if he became President?
"Enthusiastic" + "Satisfied, but not Enthusiastic" (33), , "Upset" (18), "Dissatisfied, but not Upset" (15) "Don't Know" (34).
Compare this with Biden and Trump's numbers for "Upset" (both 43), and "Dissatisfied, but not Upset" (Biden 20, Trump 11)
it's not hard to see why Kennedy is still a factor. It's also true that more Americans would be Mad if Biden won than Trump.
We may infer a Differential for Kennedy with these numbers and see if it is close to the (-1) from NBC.
Lo and Behold, it is VERY CLOSE. [33-(18+15)] = (0). Flat. Moreover, it is essential to notice that 45.4% of Kennedy's flat differential
are perhaps still open to the idea, because they might be "dissatisfied", but they WON'T be "Upset" if he wins.
Kennedy is seen as "too extreme" for 33% of Whites, but only "too extreme" for 25% of Blacks. Virtually identical Men or Women.
There is still potential for Kennedy here. If Kennedy is to grow, he has to whittle down on this "too extreme" problem, especially among Whites. Perhaps his Israel stance had something to do with this. If he did not condemn Hamas, and express support for Israel, I would expect his "too extreme" ranks among Whites to be even higher than 33, perhaps the upper 40's (a guess). Biden's biggest problem among Independents and Democrats is something he can't do anything about (age), at 46/49%. 53% of Democrats say they need a different candidate.