If you can spare the half hour required to read it, point your browser to the web site of The Atlantic, and go read their inside account of how Hillary Clinton's team, to sum it up, lost her the nomination. If you work on or are interested in campaigns and how they succeed or fail, you can't afford to not read this piece, and the associated internal documents from her campaign.

Here's a key quote from a strategy memo by Mark Penn:

If we double perform with WOMEN, LOWER AND MIDDLE CLASS VOTERS, then we have about 55% of the voters.

Just a thought: if your plan for winning a primary relies on winning 55% of the voters, you have no margin of error. Which, as it turned out, is exactly what derailed the once all-but-inevitable campaign and Presidency of Hillary Clinton.