Two-way fixed effects (TWFE) models are ubiquitous in causal panel analysis in political
science. However, recent methodological discussions challenge their validity in the …

The contemporary Republican Party has been the site of asymmetric partisan entrenchment
and factional infighting. We test whether factional pressure from a far-right faction (the Tea …

Intra-party factionalism and media fragmentation have emerged as two major trends in US
politics, especially on the right. We explore potential connections between these …

Research indicates that polarization has led to an increasing dispersion between moderate
and more extreme voters within both parties. Intraparty polarization supposedly affects the …

Objective We examine how congressional candidates use social media such as Twitter (X)
to promote a political brand and connect with voters during campaigns. Methods Using a …

US arms control policies have shifted frequently in the last 60 years, ranging from the role of
a 'brakeman'regarding international arms control, to the role of a 'booster,'initiating new …

Political parties are typically seen as conservative institutions which rarely change. Despite
this common perception, parties do change, and on occasion, transform themselves by …

How does the influence of party factions change over time? This article only begins to tackle
this question by looking at which party caucuses newly elected members join. I focus on …

Popular accounts of presidential nomination politics in the United States focus on factions,
lanes, or even a civil war within the party. This Element uses data on party leader …

Individual campaign donors offer reliable support for extremists in US politics. Can such
support waiver during economic crises, which often bolster extremists' popular appeals …