ELECTORAL COLLEGE MATHEMATICS & SWING STATE CONCENTRATION The Electoral College's winner-take-all system in 48 states creates a structural reality: presidential campaigns are decided by roughly 10-15 swing counties across 5-7 states, representing approximately 4-5% of the national population. Historically, this concentration has intensified—in 1976, competitive states numbered 15-17; by 2020, this narrowed to 6-7. These shifts reflect demographic sorting, where college-educated voters cluster in metros while rural areas consolidate, making geographic polarization self-reinforcing. This matters because campaign resource allocation, policy priorities, and candidate positioning disproportionately reflect the preferences of swing-state voters rather than national public opinion. It also creates systemic incentives for major party candidates to ignore safe-state constituencies, reducing responsiveness to roughly 70% of the electorate while amplifying the leverage of a smaller, geographically specific group—a dynamic that shapes tax policy, infrastructure investment, and regulation in ways that don't align with broader national preferences.