By John Davenport Americans agree on very few political questions in our highly polarized era. But almost 90% did not want a rematch between Joe Biden and Donald Trump, and a March poll showed that almost 59% of Americans saw both leading candidates as too old. At least on the Democratic side, the popular revolt got its way. “Too aged” is not a new problem in American politics. While Republican leaders decried Biden’s difficulties with speaking and memory, Ronald Reagan was arguably in worse shape than Biden for at least half of his second term. The same holds for 82 year-old Senator Mitch McC…