 join the compact and their combined electoral votes add up to 270 or more, the winner in the electoral college will be the winner of the popular vote. 11 states representing 165 electoral votes have already joined. More are considering signing on.
With a national popular vote every vote is sought and competed for. Every voter is sought by candidates and volunteers alike no matter where they reside.
The National Popular Vote homepage
The Electoral College: Compromise Never Meant to Last, George Pillsbury, Nonprofit VOTE, 2017
The Real Reason the Electoral College Exists, Paul Reed Amir, Time magazine, 2016