> project a decade into the future can increase costs

A very good point.

I don't agree we can blame Trump for HSR though. 2/3 of the time that has passed have had Democrats in the white house. HSR is nearly all pure-California-style self-inflicted wound. And honestly it's just the most visible project California has failed with, there are many others. The one I'm personally angry about is Prop 1. We're now 12 years after, and have no additional water resources even broken ground. It's shameful.