Tim Walz's Approval Rating Surges as JD Vance's Falls (msn.com)
A YouGov survey conducted on August 8, two days after Harris announced Walz as her vice presidential pick, found the governor with a net favorability rating of +11. That was up from a +1 net favorability in another YouGov survey conducted in late July.
Vance, on the other hand, has seen his approval rating drop since Trump announced him as his running mate on July 15.
The Republican's net favorability was -6 in a YouGov survey conducted between July 15 and July 19. It dropped to -9 in another survey conducted between July 22 and July 25.