Abolishing the Electoral College
A note of explanation to begin: California has 39.96 million residents and is worth 55 electoral points, meaning 726,545 residents per electoral vote. Wyoming has 579,000 people and is worth 3 electoral points, which is 193,000 residents per electoral vote. This means Wyoming voters have 3.76 times more voting power than Californians when it comes to presidential elections.
The fact that the electoral college is racist is true as well, but I would submit that the first of these two arguments is the stronger in favor of abolishing it. It violates the most basic principle of a democratic republic. i.e., one person, one vote.