What is Presidential Greatness?

A CNN news article addressed the age old question of, “What is Presidential Greatness?”

http://www.cnn.com/2012/10/28/opinion/opinion-presidential-greatnes…
Several notable presidential historians offer their opinion of what that means using a few examples of past presidents: Washington, Lincoln, FDR, Truman, Andrew Jackson and more.
After reading this CNN piece, discuss/consider/analyze what you think “Presidential Greatness” means. For your paper, please provide a comparison of three past or present U.S. Presidents explaining what “Greatness” means and/or how one achieves that ‘status’! Use at least six academic references and examples in your paper. Academic sources are those that are scientific and proven in some way. You will typically find these in books and journals or websites ending in .edu or .org. Sites that are not academic are .com or newsweek, time etc. Your paper should be a minimum of 5-7 pages long.

Characteristics and Structure of Your Papers
Physical structure: typed, doubled-spaced pages, including bibliography. Any standard system of citing sources is acceptable. There must be at least six references to published political science journal articles or books—in addition to any web or journalistic sources used. Wikipedia is NOT a source, academic or non-academic. Length: As much as it takes you to describe and effectively explain your topic (somepeople are verbose and do not convey anything meaningful, while others can be consise and convey much); Therefore, Length depends upon how much it takes to effectively support your research. Research papers must include the following elements:

1) Introduction: What research question or questions are you trying to answer? What
are you trying to explain?

2) Literature review section: Give a brief summary of the articles/books/material you have read that relates to your topic and designed to motivate the particular approach you take in the remainder of the paper. Use your bibliography to slant your discussion so that it leads into your own discussions of theory and evidence.

3) Theory and hypotheses section: What are the different possible answers to why you state your beliefs? In other words, how would each of these factors about your claims or beliefs in your paper, be expected, logically speaking?

4) Research design section: What are the strengths and limitations of your beliefs or evidence that you state? Here you are using your journals/book/articles to explain the strengths and limits of your beliefs.

5) Conclusion: Conclude by summarizing the question, possible answers, and results;
by discussing how future research might go beyond or improve upon what you
have done; and by mentioning any significant practical or policy implications of
the paper.

Additionally, please write or organize the paper as you wish. Make sure to include the above elements within your style of paper organization.