Yeah I agree with this, the stocks keep growing exactly because they completely ignore Biden and US politics almost entirely.

The latest growth cycles are based on either

1. the expectation that the Fed will lower interest rates and if you spend even a casual amount of time each week reading these market headlines you'd go insane, they manufacture some absurd rationales and narratives that literaly change from one day to the next. One day its up 2% because some indicator says inflation is slowing therefore "high hopes for interest rate cuts in the future" and then 2 days later another indicator says the opposite and so flip that headline 180 "oh no investors weigh in on dashed hopes for rates cut" and it changes daily.

2. the current AI "boom", I think you know this obviously US tech is now a major grift but NVIDIA also got to keep massive markups from the crypto boom during COVID, there was never a correction from those $1000+ GPUs, that is the permanent standard now for the top end. When inevitably another COVID like supply chain breakup/crisis happens they'll hike the prices another 50% from there and $1500-2k gpus will become the standard etc.

Even if AI boom crashes its almost impossible to see NVIDIA going anywhere now outside of major geopolitical events. And when that crisis happens and NVDIA increases their prices again and repeat.

And then you look at what the market says about Trump oh he will be better because of less tariffs and less taxes and that is maybe true, but the Fed is literaly independent anyway and the current boom will keep going until some major event causes a major anti-AI backlash, though the chances of that are minimal now. Yet Trump gets to benefit as being labelled as the "market favorite" even though his direct involvement is almost zero.