" Further-more, partisan attachments powerfully shape political perceptions, beliefs and values, and incumbents enjoy advantages well beyond the way in which their districts are configured. "
- Thomas E. Mann

The quote highlights how political partisanship heavily influences a person's perceptions, beliefs, and values within the realm of politics. It suggests that individuals tend to form opinions and attitudes based on their party affiliations rather than impartial analysis or objective facts. This partisan bias also gives an unfair advantage to those already in power, beyond just the geographical advantages they might have due to how electoral districts are drawn.

On a deeper level, the quote underscores the complex interplay between political partisanship and the democratic process. It implies that voters' perceptions of their representatives and government actions are often clouded by pre-existing biases derived from party loyalty. This can lead to an environment where public discourse is less about objective evaluation of policies and more about reinforcing partisan narratives, which may not serve the best interests of everyone involved in the political system. Furthermore, the quote points out that incumbents benefit not only from structural advantages like district boundaries but also from broader systemic support generated by party loyalty, making it increasingly challenging for newcomers to challenge those already in power.

Thomas E. Mann is a prominent American political scientist and commentator who has extensively studied and written about U.S. politics, with a particular focus on the dynamics between Congress and the presidency. His insights often delve into the intricacies of partisan behavior within legislative bodies and its impact on governance and public policy.