The National Popular Vote bill would guarantee the Presidency to the candidate who receives the most popular votes in all 50 states (and DC).
When every vote counts equally, successful candidates will continue to find a middle ground of policies appealing to the wide mainstream of America. Instead of playing mostly to local concerns in Ohio and Florida, candidates finally would have to form broader platforms for broad national support.
Now political clout comes from being a battleground state.
Now with state-by-state winner-take-all laws presidential elections ignore 12 of the 13 lowest population states (3-4 electoral votes), that are almost invariably non-competitive. 6 regularly vote Republican, and 6 regularly vote Democrati. 9 state legislative chambers in the lowest population states have passed the bill. It has been enacted by DC and Hawaii.
None of the 10 most rural states is a battleground state.
The current state-by-state winner-take-all method of awarding electoral votes does not enhance the influence of rural states, because the most rural states are not battleground states.
The 11 most populous states contain 56% of the population of the United States. Under the current system, a candidate could win the Presidency by winning a mere 51% of the vote in just these 11 biggest states -- a mere 26% of the nation's votes.
With National Popular Vote, big cities would not get all of candidates’ attention, much less control the outcome. The population of the top five cities (New York, Los Angeles, Chicago, Houston and Philadelphia) is only 6% of the population of the United States and the population of the top 50 cities (going as far down as Arlington, TX) is only 19% of the population of the United States. A "big city" only campaign would not win.
The current state-by-state winner-take-all system of awarding electoral votes maximizes the incentive and opportunity for fraud. A very few people can change the national outcome by changing a small number of votes in one closely divided battleground state.
The current system magnifies the incentive for fraud and mischief in closely divided battleground states because all of a state's electoral votes are awarded to the candidate who receives a bare plurality of the votes in each state. No recount would have been warranted in any of the nation’s 56 previous presidential elections if the outcome had been based on the nationwide count.