Supply side has been tried four times and works every time.
Eventually the spending catches up to you. Because supply side means a lot of deficit spending, and that will always lead to disaster as the interest on your deficit keeps climbing and climbing and more and more of your spending is just paying off the past and less and less is actually is being supply side anymore. What makes supply side work is that it’s supposed to be temporary, eventually there are cuts, which as we both point out should have been done by Bush, but he didn’t. Now we’re entering our 4th decade of supply side spending, and it doesn’t work anymore. Now we’ve got to bite the bullet of major cuts to undo 25 years of over spending.