You can't trivially shift huge numbers of votes without getting caught. To get away with it, you'd have to shift small numbers of votes in specific locations. B

You can't trivially shift huge numbers of votes without getting caught. To get away with it, you'd have to shift small numbers of votes in specific locations. But with a popular votes, small numbers of votes don't make a difference. Reliably shifting 1% of the vote in Wisconsin, Michigan, Ohio, Arizona, would throw an election one way or another under the current system. Switching 1% of the vote in Los Angeles and New York wouldn't reliably change anything with a popular vote system.