It’s not going to be built. No way. Unless the initial construction is paid 100% by federal funds.
I don’t think the whole thing will be, but you watch as at least one section is built. The San Fran link would seem to be a sure bet. What Democrat in California could resist that?
It does seem that even some Democrats in the state think this is too big a pill to swallow though. Good for them, at least with regard to this matter.