Centrist and Moderate pols will be the biggest electoral college defenders in any reform effort
...because they stand to lose the most if it's eliminated.
Most of our party's support comes from large cities and urban areas where the vast majority of Americans are clustered, and who are decidedly more progressive than rural and central regions of the nation. Rural voters have a disproportional influence on the Dem party, buttressed by the electoral college, which forces the majority of us to cater to 'centrists,' basically conservatives who don't give a damn how most of us live.
Moreover, "fully a quarter of the nations economic output comes from just a handful of the largest metropolitan areas: New York City, Los Angeles, Chicago, Dallas, Houston, Washington, D.C., and San Francisco."
Centrist-dominated politics are a drag on progress for most Americans, including on those who live outside traditionally Democratic regions of the country. The only cause endemic to Democrats they justifiably advance is this anti-democratic adherence we're seemingly inextricably bound to, using the Electoral College as an arbiter of what the nation wants and needs.
Thing is, that adherence to the EC keeps centrist-dominated states insulated from progress, and only serves to protect those things which keep those regions poor and socially deficient; keep people from affordable healthcare; from being allowed basic human rights; only serves to keep those states and regions from realizing the full beneficence we endow in the federal government, keeping their people impoverished and fettered by their conservatism.
That's the reality, and it's the reason we won't have truly representational democracy in America until rural and centrist states and regions recognize that the Electoral College protects the cynical, avaricious interests of centrist and conservative pols, more than it benefits the people who live there.