Why cognitive fitness has become a primary weapon in the Newsom-Trump feud episode artwork

EPISODE · Jan 9, 2026 · 4 MIN

Why cognitive fitness has become a primary weapon in the Newsom-Trump feud

from Phil Matier

President Trump often likes to mention his cognitive tests, both in boasts and insults to other politicians. This past week, Governor Gavin Newsom decided to join the conversation. Newsom posted on social media challenging President Trump to a cognitive test on live TV. For more KCBS Radio news anchor, Steve Scott, spoke with KCBS Insider Phil Matier and former San Francisco Mayor Willie Brown.

Episode metadata supplied by the publisher feed · Published Jan 9, 2026

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Why cognitive fitness has become a primary weapon in the Newsom-Trump feud

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