American Government › Section I · Political parties › Topic I.4

Divided government and polarization

In 1950 leading political scientists complained that America's two parties were too alike to give voters a real choice. Today the complaint is the reverse: the parties are far apart, often share power uneasily, and their supporters increasingly distrust each other.

In this topic

  • From too similar to too far apart
  • Divided and unified government
  • Costs and benefits of divided control
  • Shutdowns and standoffs
  • What polarisation means
  • Worked example: reading data on partisan dislike
  • Explaining polarisation: sorting and media
  • Explaining polarisation: district lines
  • Worked example: testing the gerrymandering thesis
  • Common mistakes to avoid
  • Key takeaways

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