A survey of Oregon voters in 2008 showed 76% overall support for a national popular vote for President.

Most Americans don't ultimately care whether their presidential candidate wins or loses in their state or district . . . they care whether he/she wins the White House. Voters want to know, that no matter where they live, even if they were on the losing side, their vote actually was equally counted and mattered to their candidate.  Most Americans think it is wrong that the candidate with the most popular votes can lose. We don't allow this in any other election in our representative republic.

Because of state-by-state winner-take-all laws, not mentioned, much less endorsed, in the Constitution. . . 
		
Policies important to the citizens of non-battleground states, like Oregon, are not as highly prioritized as policies important to ‘battleground’ states when it comes to governing.