Senate Minority Leader Mitch McConnell (R-Ky.) saw the largest decline in his approval rating among GOP voters, dipping 29 points, to 41%. Sen. John Thune (R-S.D.), who is up for re-election next year, saw his approval rating fall 16 points among Republican voters, and just 22% are “strongly” in his corner. Intraparty declines for retiring Pennsylvania, Ohio senators illustrate the challenges of simultaneously satisfying both the base and the broader electorate in the Trump era ahead of contested primaries. “You cannot say, ‘Trump voters, come out and vote and support us’ while saying ‘Trump’s a horrible person,’” said Shermichael Singleton,...