Take Illinois as a small scale version of what you'd be suggesting. Illinois is always blue, yet if you look at the way their map votes, there are only a handful of counties that actually vote blue while the rest of the state votes red. So politicians running for national office know this and spend virtually no time in out-state Illinois and almost entirely in the Chicago area. Money from outstate Illinois generally gets funneled through Chicago as well. For all intents and purposes, the geographic majority of Illinois is disenfranchised. Get rid of the EC and you will do the same to the geographic majority of the country. Hell, the massive population areas of the NE and southern California may be enough to override most of the rest of the country if they are want to do so. Politicians will know this and pander to only that crowd. Over time that can cause a host of issues. Essentially, it's tyranny of the majority. And while it's easy for urbanites to scoff at that notion, that protection helps minorities of any kind be it political, geographic, racial, or gender. If, for whatever reason, concentrated majorities started to force themselves on others in a different way (not urban vs. rural, but white vs. black for instance), the EC gives the minority a fighting chance. It's the same reason why every state, regardless of population, has two Senators. Could the EC be rebalanced a bit to make that a little less tilted towards rural areas? Sure, but getting rid of the EC altogether is not a good idea.