Markey vs. Kennedy (2020)
Rep. Joe Kennedy III, then 39, challenged Markey, then 74, in the Democratic Senate primary. Kennedy argued for generational change. Markey ran to the left, embracing the Green New Deal and Medicare for All, and won by about 10 points.
Markey won the primary and the general election.
The win cemented his status as a progressive champion.
This is the same pattern: an older progressive incumbent defeating a younger challenger by running to the left.
