On the other hand, Tobias, the whole Swift Boat thing in 04' was widely chalked up as Kerry's big mistake, since he decided to be "above it" and not address it beyond a general refutation while the other side ran wild with it for months and let it sink in. Similarly, Bush, unlike Trump, who snaps at any provocation, would often let many attacks stand because he felt it would be unpresidential to get down in the mud and fight it out. The end result for both Bush and Kerry was that the charges stuck and drew their approval down.
Trump relentlessly pushes back on every detail to the point of being hypersensitive, but it seems to work better than just letting it sit there.