Unable to agree on any particular method for selecting presidential electors, the Founding Fathers left the choice of method exclusively to the states in Article II, Section 1
“Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors….”  
The U.S. Supreme Court has repeatedly characterized the authority of the state legislatures over the manner of awarding their electoral votes as "plenary" and "exclusive." 

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.