Trump is measurably more polarizing on the standard quantitative indicator—partisan approval gaps—while Obama presided over a major acceleration of polarization but did not produce gaps as large or sustained as Trump’s. The fairer framing is: Obama inherited and accelerated an already polarizing era; Trump pushed partisan division to record levels.[
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What the numbers show
Gallup found that Trump’s first-term average partisan gap of 81 points exceeded the prior record—Obama’s—by 11 points. Pew similarly reports that the partisan gaps in both Trump terms are the widest in more than seven decades of tracking, with Obama next among recent presidents at 67 points.[
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Why Obama looks divisive
Obama’s presidency coincided with intense polarization: the stimulus and Affordable Care Act passed without Republican support, the Tea Party backlash reshaped the GOP, and partisan/media conflict intensified. PBS’s
Frontline describes the ACA fight and 2010 midterms as moments that “solidified and accelerated” polarization.[
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But “divisive approval ratings” do not by themselves prove Obama personally caused the divide. Structural forces—partisan media, geographic sorting, racial backlash, congressional obstruction strategies, and the aftermath of the Great Recession—were already operating, and Obama faced a Republican opposition that largely withheld support from his agenda.[
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Why Trump looks more divisive
Trump’s divisiveness was both broader in degree and more directly tied to his political style: sustained attacks on opponents, media, institutions, and norms; highly personalized politics; and consistently near-unanimous support from his own party paired with extremely low support from the opposing party. Gallup recorded 91% Republican approval versus 6% Democratic approval early in his second term—an 85-point gap.[
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His first term ended with an average 81-point partisan gap, the largest Gallup had measured to that point, and his final year averaged an 85-point gap. In other words, Obama’s most polarized year was roughly comparable to Trump’s
less polarized years, while Trump repeatedly set new highs.[
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Bottom line
- Obama: Highly polarizing in outcome, especially by the end of his presidency, but much of the division reflected long-term structural trends plus fierce opposition to his agenda.[news.gallup][pbs]
- Trump: More polarizing in both magnitude and consistency; his approval gap broke the records Obama had set and remained exceptionally wide across both terms.[news.gallup][pewresearch]
- Caveat: Approval-gap data measures partisan sorting around a president; it does not fully capture rhetoric, democratic norms, race relations, political violence, or institutional conflict. Those require qualitative judgment, where reasonable people weigh presidential conduct differently.[news.gallup][pbs]