Where Carville is wrong is that the long term welfare of society is not a product of having a "winning message." It hinges on convincing people to adopt the best policies. As long as #politics is reduced to "winning", we'll never secure the best solutions.https://www.vox.com/policy-and-politics/2020/2/7/21123518/trump-2020-election-democratic-party-james-carville …
Answer: they don't just abandon the winning message and pursue the policies they think are actually important. They compromise their ethics to get re-elected.