It’s a myth that the way we currently elect the president favors Republicans. In 2004, a shift of approximately 59,000 votes in unpredictable Ohio (about .09 percent of the all ballots cast nationally), would have given Democrat John Kerry the electoral vote and the White House, even though Republican George W. Bush won the popular vote by 3.2 million votes.
It’s also a myth that big, Democrat-leaning coastal cities would dominate a national popular vote election. Bush’s 2004 popular vote victory came from the 38 predominately rural, smaller states.
What’s a fact is that under the current system of state-by state winner-take-all, something as non-partisan as a change in weather (forget meddling), could suppress or encourage just enough individual votes, in a critical county, in an undecided state, to determine the outcome of a close election.