Commentary It’s an old Washington political trick. When you’re in trouble, change the subject. When President Biden’s poll numbers are low and falling, when the economy has produced the worst inflation in four decades and gas prices in some states have reached record highs, when he claims we should expect food shortages and produces gaffes instead of gas and then refuses to walk them back, even after aides have tried to correct him, change the subject. Biden’s troubles are compounded when he denies walking back any of his statements and tries to explain he didn’t mean what he said. While the president attempts to persuade us that we are experiencing the best economy in decades, we know otherwise. We should not focus on bad things, he tells us, but look to his budget proposal for fiscal 2023, which he claims will lower the deficit and do all sorts of things …