http://www.vox.com/the-big-idea/2016/11/29/13771920/electoral-college-faithless-electors-independent-trump
"Constitutional history makes clear that the founders had three main purposes in designing the Electoral College. The first was to stop a demagogue from becoming president. At the Constitutional Convention, arguing in support of the Electoral College, Elbridge Gerry of Massachusetts said he was “against a popular election” for president because the people would be “misled by a few designing men.” In Federalist No. 68, Alexander Hamilton wrote that the electors would prevent those with “Talents for low intrigue, and the little arts of popularity” from becoming president. They would also stop anyone who would “convulse the community with any extraordinary or violent movements.” The second goal was to stop foreign interference in election. In the founding period, the framers were extremely concerned about infiltration by rivals including Great Britain. In Federalist No. 68, Hamilton wrote that one major purpose of the Electoral College was to stop the “desire in foreign powers to gain an improper ascendant in our councils.” He said that the college would “Guard against all danger of this sort … with the most provident and judicious attention” from the electors. The third goal was to prevent poor administration of government. This is a less well-known purpose of the Electoral College, but it is again expressly discussed in Federalist No. 68. Hamilton wrote that “the true test of a good government is its aptitude and tendency to produce a good administration,” and for that reason, he said, the electors should be “able to estimate the share which the executive in every government must necessarily have in its good or ill administration.” This election has three aspects that have brought the Electoral College back to relevance."
