Who was the worst president of your lifetime, and why? My vote is for Lyndon Johnson. He prosecuted the Vietnam War in such a way as to render it unwinnable; in fact, never had any intention of TRYING to win. This was a massive betrayal of American blood. I hope they kept hell hot for him. His Great Society farce wasted untold billions of dollars and allowed the Federal Government to grow into a monster. We will feel it's repurcussions for many generations. We've had some real squareheads in the Oval Office, but I think Johnson takes the cake.