Is political polarization worse than it's been in the past?
Yes, by multiple standard measures, political polarization in the United States—particularly elite/congressional, partisan sorting, ideological consistency, and affective (emotional) polarization—is higher than it has been in recent decades (roughly the post-World War II or post-1970s period), though it is not unprecedented in the full span of U.S. history. Levels rival or exceed those of the late 19th/early 20th century in Congress and stand out internationally among established democracies. Nuances exist: some public opinion divides have deeper roots, shifts can be asymmetric, the center of the public is less extreme than activists/elites, and divisions remain “fuzzy” rather than fully tribal. Historical peaks (e.g., Civil War era) were far more severe in consequences.[1][2]
Congressional/Elite Polarization
Using DW-NOMINATE scores (which place legislators on a liberal-conservative dimension based on roll-call votes, comparable over time), Democrats and Republicans in Congress are farther apart ideologically than at any point in the past 50 years. Overlap between the parties has essentially vanished (no overlap in the House since ~2002 and Senate since ~2004), moderates have dwindled dramatically (from over 160 in the early 1970s to about two dozen more recently), and both parties have become more internally cohesive.[2][2]
This contributes to gridlock, as common ground shrinks.
Public Ideological and Issue Polarization + Sorting
Public opinion shows rising polarization and sorting (people’s views aligning more consistently with one party/ideology, reducing cross-pressures).
Some research notes that underlying value clusters (e.g., moral/religious) have been relatively stable longer-term, with the big change being partisan alignment/sorting of those views into the two parties. Demographic groups (income, race) have sorted into parties without always increasing their own ideological distances as much.[11][12]
Affective Polarization (Dislike of the Other Side)
This has risen sharply and is a key driver of “feeling worse.” Feeling thermometer ratings (warmth toward own party vs. opposite) show a growing gap: out-party ratings have dropped significantly (e.g., from near-neutral decades ago toward strongly negative), while in-party warmth is more stable or slightly down. Differences have roughly doubled in some ANES analyses since the 1970s/1990s.[13][14]
Broader Context, Causes, and Caveats
In short, for the living memory of most Americans and relative to the mid-to-late 20th century baseline of greater bipartisanship and less sorted/affectively hostile parties, yes—it is worse. It is a return toward (or beyond) earlier high-polarization norms in American politics, amplified by modern conditions, but without the existential violence of the worst historical episodes. Data come primarily from sources like Pew, ANES, Gallup, DW-NOMINATE/Voteview, and academic studies using surveys and roll calls. Trends can reverse with realignments, institutional changes, or external shocks, as history shows.
Citations (19)
- https://www.cnn.com/2026/07/05/politics/trump-july-4-america-250-civil-war-analysis
Backs: “Historical peaks (e.g., Civil War era) were far more severe in consequences.”
background, article, neutral. Claim: Polarization is not unprecedented in U.S. history; Civil War era was far more severe in consequences.
- https://www.pewresearch.org/short-reads/2022/03/10/the-polarization-in-todays-congress-has-roots-that-go-back-decades/
Backs: “Historical peaks (e.g., Civil War era) were far more severe in consequences.”
statistic, article, points to yes. Claim: Congressional Democrats and Republicans are farther apart than in 50 years; no party overlap since early 2000s; moderates dwindled.
- https://bpb-us-w1.wpmucdn.com/sites.usc.edu/dist/2/77/files/2022/09/Polarization-lost.pdf
Backs: “Polarization has declined after one party achieves dominance or realignments occur.”
evidence, official document, neutral. Claim: Current congressional polarization matches or surpasses late 1800s-early 1900s peaks; earlier high-polarization eras existed.
- http://www.rochester.edu/college/faculty/alexander_lee/wp-content/uploads/2026/05/How_Polarization_Ends-12.pdf
Backs: “Polarization has declined after one party achieves dominance or realignments occur.”
evidence, official document, neutral. Claim: Polarization declines after one party achieves dominance or realignments occur.
- https://goodauthority.org/news/our-politics-may-be-polarized-but-thats-nothing-new/
Backs: “Polarization has declined after one party achieves dominance or realignments occur.”
evidence, article, points to no. Claim: Earlier high-polarization eras existed, so today's polarization is nothing new.
- https://phys.org/news/2026-02-political-division-surged-onward.html
Backs: “The equal size of left/right clusters (unusual globally) intensifies the feeling of division; opinions within clusters haven’t necessarily narrowed into pure extremes.”
statistic, article, points to yes. Claim: Cambridge ANES analysis found issue divisions rose ~64% since 1988, mostly after 2008, possibly leveling recently.
- https://www.cam.ac.uk/stories/political-division-united-states
Backs: “The equal size of left/right clusters (unusual globally) intensifies the feeling of division; opinions within clusters haven’t necessarily narrowed into pure extremes.”
statistic, article, points to yes. Claim: Cambridge analysis: left cluster more socially liberal, equal-size camps intensify division; U.S. an outlier among stable democracies.
- https://www.pewresearch.org/politics/2014/06/12/political-polarization-in-the-american-public/
Backs: “Later data confirm continued gaps on issues like immigration, climate, abortion, and government power.”
statistic, article, points to yes. Claim: Pew 2014: consistently liberal or conservative share doubled from 10% to 21%; party ideological overlap shrank.
- https://news.gallup.com/topic/ideology.aspx
Backs: “Overall public ideology is more stable than elite or sorted partisan views, with many still holding mixed positions.”
evidence, data page, points to yes. Claim: Gallup ideology data show partisan ideological identification gaps widening.
- https://thehill.com/blogs/blog-briefing-room/4713508-democrats-liberal-identification-social-economic-issues-gallup/mlite/
Backs: “Overall public ideology is more stable than elite or sorted partisan views, with many still holding mixed positions.”
evidence, article, points to yes. Claim: Democrats' liberal identification has risen on social and economic issues.
- https://fsi.stanford.edu/news/polarization-united-states-reconsidered
Backs: “Demographic groups (income, race) have sorted into parties without always increasing their own ideological distances as much.”
evidence, article, points to no. Claim: Underlying value clusters have been stable; the main change is partisan sorting of views.
- https://www.nature.com/articles/s41562-025-02251-0.pdf
Backs: “Demographic groups (income, race) have sorted into parties without always increasing their own ideological distances as much.”
evidence, official document, points to no. Claim: Demographic groups sorted into parties without always increasing their own ideological distances.
- https://goodauthority.org/news/americans-views-of-the-opposite-party-have-declined-even-further/
Backs: “Differences have roughly doubled in some ANES analyses since the 1970s/1990s.”
evidence, article, points to yes. Claim: Out-party feeling thermometer ratings have dropped significantly.
- https://link.springer.com/article/10.1007/s11109-022-09784-4
Backs: “Differences have roughly doubled in some ANES analyses since the 1970s/1990s.”
evidence, article, points to yes. Claim: Affective polarization gap has roughly doubled in ANES analyses since the 1970s/1990s.
- https://www.nber.org/papers/w26669
Backs: “The U.S. has seen the largest increase among a set of OECD countries over recent decades.”
evidence, official document, points to yes. Claim: U.S. has seen the largest increase in affective polarization among OECD countries.
- https://web.stanford.edu/~gentzkow/research/cross-polar.pdf
Backs: “The U.S. has seen the largest increase among a set of OECD countries over recent decades.”
evidence, official document, points to yes. Claim: U.S. has seen the largest increase in polarization among compared countries.
- https://www.pewresearch.org/packages/political-polarization/
Backs: “High shares view the other party as a threat to the nation’s well-being; willingness to have opposing partisans as family/friends has declined; perceptions of disagreement even on basic facts are widespread. Record numbers see the country as deeply divided on values.”
evidence, other, points to yes. Claim: High shares view the other party as a threat; record numbers see the country as divided on values.
- https://carnegie.org/article/why-polarization-is-a-problem/
Backs: “High shares view the other party as a threat to the nation’s well-being; willingness to have opposing partisans as family/friends has declined; perceptions of disagreement even on basic facts are widespread. Record numbers see the country as deeply divided on values.”
evidence, article, neutral. Claim: Polarization is a problem; the middle prefers compromise but participates less; extremes are louder.
- https://www.theatlantic.com/ideas/archive/2022/05/us-democrat-republican-partisan-polarization/629925/
Backs: “This “us vs. them” dynamic has intensified since the mid-2000s in many places but stands out in the U.S. as a wealthy democracy.”
evidence, article, points to yes. Claim: Us-vs-them dynamic intensified since mid-2000s, standing out in the U.S. among wealthy democracies.