Is Trump unifying conservatives and liberals or is he increasing the hostility between the two groups?
Donald Trump criticizes Democrats significantly more often and with much higher intensity than other recent Republican presidents did. https://theconversation.com/trump-speaking-poorly-of-other-presidents-is-uncommon-but-not-unheard-of-in-american-presidential-history-255568 Political scientists, historians, and communication analysts have extensively tracked presidential rhetoric, establishing that Trump's approach represents a fundamental shift away from traditional norms of bipartisanship and institutional decorum. https://www.aei.org/commentary/the-truth-behind-trumps-exaggerated-claims-of-his-republican-party-popularity/ While partisan polarization has been steadily increasing since the 1990s, Trump has actively leaned into it. Data from the Pew Research Center highlights that a vast majority of the public, particularly Democrats, view his sharp shift in rhetorical tone as having a fundamentally transformative impact on American political debate.
https://www.pewresearch.org/politics/2019/06/19/trumps-impact-on-the-tone-of-political-debate-important-characteristics-for-elected-officials/