Analysis of information sources in references of the Wikipedia article "Efforts to reform the United States Electoral College" in English language version.
After all, the same constitutional principles that allow a state to bind its electors to the winner of the statewide popular vote should allow it to bind its electors to the winner of the nationwide popular vote. This means that if states that combine to hold a majority of electoral votes all agree to support the popular-vote winner, they can do an end-run around the Electoral College. America would still have its clumsy two-step process for presidential elections. But the people's choice and the electors' choice would be guaranteed to match up every time.