This guy's take seems quite reasonable (he's a professor of political science, so I'm more inclined to trust him than most people). I think lack of visibility, combined with the inevitable negativity from his camp will do far more harm to his campaign than good.

What the Trump Assassination Attempt Means for November's Election

On July 13, an assassin attempted to take the life of Donald Trump, the presumptive Republican nominee for president. We extend deepest condolences to those ...