Fact check: Is there a list of the ideologies of mass shooters in the USA and whether they are republican or democrat?

1. Summary of the results

Based on the analyses provided, no comprehensive list exists that categorizes mass shooters in the USA by their ideologies and Republican or Democrat party affiliations. The sources examined do not provide the specific data requested in the original question.

However, the analyses reveal some relevant findings:

• Research exists on ideologically-motivated mass shooters and how they differ from other mass shooters, though without explicit party affiliation breakdowns ^[1]
• A database of public mass shootings includes demographics and motivations but does not explicitly categorize shooters by Republican or Democrat affiliations ^[2]
• Recent extremist violence data shows that all US extremist mass killings in 2022 were linked to far-right extremism according to the Anti-Defamation League ^[3]

The analyses also reference specific recent cases, such as the Minneapolis school attacker who was "obsessed with the idea of killing children" and whose case was classified as domestic terrorism by the FBI ^{[4] [5]}.

2. Missing context/alternative viewpoints

The original question assumes that mass shooters can be neatly categorized by traditional political party affiliations, but the analyses suggest this framing may be oversimplified. Several important contextual elements are missing:

• Ideological motivations may not align with traditional Republican/Democrat categories, as many mass shooters are driven by specific extremist beliefs that transcend conventional party lines ^[1]
• The Anti-Defamation League's research indicates that extremist mass killings specifically are dominated by far-right ideology, but this represents only a subset of all mass shootings ^[3]
• Academic research institutions and civil rights organizations like the Anti-Defamation League benefit from highlighting patterns in extremist violence, as this supports their mission and funding for continued research
• Political parties and media organizations would benefit from narratives that either emphasize or downplay connections between political ideology and mass violence, depending on their partisan interests

3. Potential misinformation/bias in the original statement

The original question contains an implicit assumption that may lead to biased conclusions:

• It presupposes that mass shooters' ideologies can be meaningfully categorized using the Republican/Democrat binary, when the research suggests that ideologically-motivated shooters often operate outside traditional party frameworks ^[1]
• The framing could encourage false equivalencies between different types of political violence, when the available data shows that extremist mass killings are disproportionately linked to far-right ideology ^[3]
• The question may inadvertently promote partisan finger-pointing rather than understanding the complex psychological and social factors that drive mass violence

The absence of such a comprehensive list in the analyses suggests that either the data doesn't exist in the requested format, or that researchers and organizations have found more nuanced categorization systems to be more useful for understanding and preventing mass violence.