• The claim search database returned no relevant fact-checks for this specific assertion.
• The phrase "is a horror show" is a subjective value judgment expressing political opinion or personal disapproval, not a verifiable factual claim.
• There is no objective, measurable standard for what constitutes a "horror show" in political leadership; assessments of mayoral performance are inherently matters of opinion.
• While various political figures have expressed strong negative opinions about Sadiq Khan (e.g., Donald Trump calling him a "terrible mayor" and a "national disgrace"¹²), these remain subjective characterizations rather than objectively true or false statements.
• Because this claim is a statement of opinion rather than a factual assertion, it cannot be fact-checked or assigned a truth value.

Overall validity: Unknown

1. London Mayor Sadiq Khan calls Trump 'racist, sexist and ...
2. Islamophobic posts about Sadiq Khan more than double in a year, analysis shows | Sadiq Khan | The Guardian