Commentary Warning lights should be flashing. Less than a month in, it’s becoming evident that President Joe Biden’s economic policies are likely to end in disaster. The wrong economic diagnosis and the politics of not letting any crisis go to waste is leading to the most damaging mix of economic policy in decades. The administration is in thrall to the Keynesian demand-management paradigm that treats every big economic downturn as a potential replay of the Great Depression, thus requiring massive fiscal and monetary stimulus to revive demand. But the Covid slump wasn’t driven by lack of demand, but by deliberate policy decisions taken by federal and state governments to close down economic activity for reasons of public health. For the time being, Covid policy is economic policy. The 11 states with the highest unemployment are all deep blue; they imposed some of the nation’s most draconian lockdown policies. Eleven of the 12 states with …