The winner-take-all method of awarding electoral votes became dominant only in the 1830s, when most of the Founders had been dead for decades, after the states adopted it, one-by-one, in order to maximize the power of the party in power in each state. 

The constitutional wording does not encourage, discourage, require, or prohibit the use of any particular method for awarding a state's electoral votes.
	
States have the responsibility and constitutional power to make all of their voters relevant in every presidential election and beyond.  Now, 38 states, of all sizes, and their voters, because they vote predictably, are politically irrelevant in presidential elections.

The National Popular Vote bill is 61% of the way to guaranteeing the majority of Electoral College votes and the presidency in 2020 to the candidate who receives the most popular votes in the country, by changing state winner-take-all laws