If states totaling an additional 105 electoral votes pass the Compact, the candidate with the most votes across the nation is guaranteed to become the President. 

Under the Constitution, states decide how to select electors for the Electoral College. By enacting the National Popular Vote Interstate Compact, a state will choose the electors nominated by the party whose Presidential candidate has obtained the most votes cast in the nation. The legislation only goes into effect when states aggregating 270 electoral votes have passed the law.

Ten states and Washington, D.C. have passed the NPV Compact. These jurisdictions have 165 electoral votes. If states with 105 more electoral votes out of the remaining 373 pass the NPV Compact, then the Compact goes into effect.

Dr. John R. Koza, co-founded National Popular Vote Inc. (NPV). He co-authored Every Vote Equal: A State-Based Plan for Electing the President by National Popular Vote.  For more than a decade, Dr. Koza and others have worked successfully to have states enact the Compact.