Read other letters about this article
So what exactly did you (or that politician) find vague about the '68 Nixon campaign? And what do you find that makes Obama more vague than Hillary or McCain (We're not pulling out of Iraq until we succeed)? And even if a politician is quite specific ("No new taxes") or they have "plans", I'm not going to 100% "believe" them. They have to negotiate, cut deals, and handle unforseen events. Plus they may be flat out lying.