President Obama spent eight years peddling catchy phrases like "change you can believe in," "an economy built to last," "middle-class economics." But at the same time, he insisted that cutting taxes and deregulating the economy have "never worked." So he raised taxes, unleashed regulators, and disparaged the private sector. Businesses, in turn, hunkered down, not knowing what anti-business policy might emerge next from the administration. The recent surge in optimism among job creators should be a clear enough rebuke to Obamanomics. And it should serve as a loud warning to those Democrats who are determined to stop Trump's pro-growth agenda....