Obama has been to CA 19 times. Each of those visits he has gone to at least 2 fundraisers.
Not once has he discussed the aging water infrastructure that supports much of American's crop production.
Not once has he discussed securing the border and preventing human trafficking coming from the border.
Not once has he discussed why the most populous state with tons of resources at its disposal has the highest energy costs in the country (making Hawaii and Alaska look cheap) - he was happy to talk about Tesla motors because all the cool kids talk about that
If it's not cool or doesn't put money into his party he can't be bothered with it.