CNN focuses on Trump's health, but says Biden's is off-limits

Trump’s mental and physical health has been a source of extensive coverage by the three channels — though Fox’s is often to criticize other outlets’ coverage of the topic. The timeline below shows the subject receives considerably more mentions per month on MSNBC and CNN, excluding the three major spikes in coverage on all three channels when the president’s health examinations take place.

Putting this all together, if speculation about the health of Trump – who this week turns 73 — warrants dozens or more mentions a month, why should the fitness of other candidates — including one who would be 78 on the next Inauguration Day — be off-limits?