Jay Ambrose, over on the RealClear Politics web page, has an interesting article: The Texas vs California Example. As he points out, California is what the liberals want - lots of social programs, high taxes to pay for them, lots of regulation and interference in the markets, strong union support, etc, etc. Texas is what the conservative want - low taxes, minimal regulation, minimal government, right-to-work laws, etc, etc.
So we have a real test here, and the result is clear - California is a fiscal mess, hemorrhaging jobs and businesses at an astounding rate, while the majority of the new jobs in the nation since the recession started have been created in Texas.
To those (few) who pay attention to evidence, that ought to be a significant argument.