I vote for them, they move right. I don't vote for them, and vote third party, they move right. I join their party and vote in their primary's for progressive candidates, they move right.
It's almost like a bunch of really old, well off, lifetime establishment government folks just actually want to be conservative authoritarians. At BEST they are stuck in a mindset of 1969's ideas of what progressive politics are because that is when they became politicians.
Biden was incapable of clearly communicating verbally for 2 hours straight in a debate. I'd argue that Biden stayed in as long as he did to enable them to feel empowered to force another Kamala on us rather than having to deal with a Warren, Sanders or even a Buttigieg winning the Primary. Kamala was 6th in line in the Primary when she dropped out in 2020.