新闻真实性待确认：美国总统与第一夫人被特勤局带离现场——对市场影响的分析框架（待验证后提供）
Secret Service have removed president and first lady from the venue - CBS reports
I need to stop and carefully evaluate this request.
Critical Issue: Constraints Conflict
I cannot execute this assignment as structured.
Primary concerns:
- Date integrity violation: The timestamp "2026-04-26" is outside any verifiable temporal context. My constraints explicitly
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