There are a lot of issues at play in this election cycle; some of them are very well voiced by both candidates (e.g. immigration) and others are secondary. If you're looking for an essay on the feasibility of Trump's fabled wall (or how he's backpedaling on that promise), or whether or not Clinton actually stored classified information on her servers (or if her security inadequacies just made that possible), then this is not the article you're looking for.
This article seeks to paint the broader context in which these more sensational actions occur. It's one thing to be for, or against, Trump's resistance to multiculturalism and something else entirely to know that the United States has been resisting multiculturalism since before they were united. Similarly, it's one thing to lament Obama's soft approach to dealing with ISIL and something far worse to consider that Obama is attempting to prevent the same mistakes that Bush (and a first-term Obama) made against AQI.
In understanding the broader context, it is my hope that we'll be able to understand the motivations of the candidates and the likelihood of them actually carrying out their various promises and threats. It's very rare that we see a candidate actually uphold his, or her, campaign promises, but when we consider the broader context of US political history, we needn't be as surprised by the promises they choose to leave unfulfilled.