The impeachment managers and their advisers have scoured social media sites as they seek to build a case that the former president incited his supporters to attack the U.S. Capitol.

Some have expressed concern that Trump supporters might turn to violence if their candidate does not win the election. What constitutes dangerous political speech and how it can incite violence.

Who is to blame when hateful rhetoric turns into violence?

A scholar of rhetoric makes note of one way Trump’s language has changed since he became president.

One way to evaluate Trump objectively is to examine the Mueller Report for the president’s rhetorical strategies and tactics.

NPR's Ari Shapiro talks with Jennifer Mercieca, a historian of American political rhetoric, about how President Trump has changed the way Americans talk about politics, the government and each other.

At the root of the assault on the U.S. Capitol last week was a false claim of election victory. Disavowal by GOP leaders could help defuse mob anger.

Texas A&M Professor Jennifer Mercieca said Twitter’s actions of removing President Trump’s tweets and suspending his account were “probably too late.”