Senator Kennedy of Massachusetts, also known as the "Hero of Chapaquidick" recently said that President Bush's credibility on the Iraq War was comparable to President Nixon's on the Vietnam War.
Since the "distinguished senator" from Massachusetts couldn't remember what happened on the previous night, he shouldn't be expected to remember 40 years ago.
President Nixon may have lacked credibility on many things, but the Vietnam War wasn't one of the them. It was Presidents Kennedy and Johnson who got us into the Vietnam War, not Nixon. Remember the Tonkin Gulf resolution based on false and misleading statments: LBJ was president, not Nixon.