I was going to post this reply this on the Berkshire board, but this feels more appropriate here:

I see the market is up pre-market. Guess it’s happy about lower taxes, but long term how is this a good thing for US based investing? How will having Elon able to pull the levers of government in his favor a good thing, if you aren’t invested in his companies?

I wrote a longer reply to you, but decided to summarize it. Berkshire is in a bad place in the short term because it is not in favor with the leadership or inner circle. Longer term, if reducing highly educated immigration and isolationist foreign policy and economic policy are successful, then BRK may be better than average owning the durable assets it owns, at the expense of gross underperformance of the US economy. Unfortunately, the loss in global US influence may be unrecoverable and the China and the RMB have been patiently waiting. So many people who should know better take this for granted 🤷‍♂️. And I disagree with Munger that there is any scalable, profitable way to invest in China for Americans.

In a corrupt government, invest in the leadership, allies of the leadership, or companies that can afford to pay bribes. Whether you feel that describes this administration or the prior 2016 one is up to you. Consider scenarios like propublica.org - Trump covid pandemic contracts.