The claim that the U.S. Ranks 3rd globally in gun violence and would drop to 189th if excluding five Democratic-run cities with strict gun laws is not supported by available evidence and oversimplifies complex data.
Among the 193 countries globally, the United States ranks 3rd in gun violence. However, if you exclude the top 5 U.S. cities with the highest gun violence—Chicago, St. Louis, Los Angeles, Philadelphia, and Detroit—all of which are run by Democratic administrations with strict gun control laws—the U.S. ranking would drop drastically to 189th out of 193 countries.

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Source: pewresearch.org
Key Evidence
Multiple sources confirm that major U.S. Cities with high violent crime rates tend to be run by Democratic mayors.
en.wikipedia.orgen.wikipedia.orgList of mayors of the 50 largest cities in the United States
ballotpedia.orgballotpedia.orgList of current mayors of the top 100 cities in the United States
FBI data shows these cities have high crime but do not support a claim that excluding them would drop U.S. Gun violence ranking from 3rd to 189th globally.
axios.comaxios.comSome blue cities in red states have the nation's highest homicide rates, FBI...
thehill.comthehill.comTop 10 highest crime rate cities as Donald Trump eyes federal intervention
No source provides authoritative global rankings placing the U.S. Exactly 3rd or shows impact of excluding specific cities on such rankings.
What the Evidence Shows
1. U.S. Gun Violence Ranking Globally: None of the provided sources directly confirm that the United States ranks exactly 3rd out of 193 countries in gun violence. Global gun violence rankings typically rely on homicide rates or firearm-related death rates from organizations like the WHO or GunPolicy.org, which are not cited here. Without authoritative global comparative data, this specific ranking is unverified.
2. Impact of Excluding Five Cities: The claim that excluding Chicago, St. Louis, Los Angeles, Philadelphia, and Detroit would drop the U.S. Ranking to 189th is highly questionable. These cities do have high violent crime rates and are generally run by Democratic administrations.en.wikipedia.orgen.wikipedia.orgList of mayors of the 50 largest cities in the United States
ballotpedia.orgballotpedia.orgList of current mayors of the top 100 cities in the United States However, no source provides data showing such a drastic change in national ranking by excluding these cities.
3. Political Leadership and Gun Control Laws: It is true that many large U.S. Cities with high violent crime rates are led by Democrats and have relatively strict local gun control laws.bbc.combbc.comUS elections 2020: Fact-checking Trump on crime in Democratic-run cities
axios.comaxios.comSome blue cities in red states have the nation's highest homicide rates, FBI...+1 more However, the relationship between local gun laws and gun violence rates is complex and influenced by many factors including socioeconomic conditions, policing, state laws, and illegal firearms trafficking.
4. Data on Crime Rates in Cities: FBI data referenced in sources show that some Democratic-run cities have high violent crime rates, but Chicago ranks 29th among large cities for violent crime rate, which complicates the narrative that these five cities alone drive national statistics.thehill.comthehill.comTop 10 highest crime rate cities as Donald Trump eyes federal intervention+1 more
5. Limitations: The claim oversimplifies a multifaceted issue by attributing national gun violence rankings primarily to a handful of cities and their political leadership without accounting for broader state and federal factors or providing direct global comparative data.
In summary, while parts of the claim about city leadership and crime rates align with evidence, the specific global ranking figures and the dramatic effect of excluding five cities lack supporting evidence and are misleading.