I really doubt many undecideds who might otherwise vote for Harris will now say "No, can't do it with Walz as VP."
There were a lot of attacks on Vance obviously, it's expected, but again, I doubt any undecideds would be swayed by that pick either.
I don't see Walz as being so far LEFT of other Democrats as to really matter. The top of the ticket will be probative. I'll be interested in seeing Harris in "unscripted moments" to see if she can handle questions better than in the past.