Once states with 270 votes join the Compact, all member states have pledged to award their electoral votes to the winner of the national popular vote. This will ensure that no one can become president without winning the most votes. It also means that candidates will no longer be able to campaign only in swing states while ignoring the majority of Americans. Every vote will matter equally, and the president will have to govern in the interest of all Americans instead of special interests in a tiny fraction of states.
Thirteen other states, most recently New Mexico and Colorado, and the District of Columbia have already passed the Compact, totaling 186 votes. Delaware has three electoral votes, bringing the total to 189, or 70% of the votes needed.