Hate to say it, but this is like Rand visiting China for two days and then giving an opinion on Chinese culture and how to change it.
MSNBC reflects the average Californian more than anything. They believe that the GOP is made up of evil, racist, white men, who smoke cigars in back rooms with corporatists. Any talk about reducing regulation will be seen as confirmation of the GOP pushing the Corporatist agenda. Democrats here also believe that it's the Democrats who want to fix the tax system. Seriously. Democrats will pat each other on the back and say that if only the Democrats can take the House and Senate, then they can "fix" the tax code.
CA Democrats don't care about economic growth. Democrats don't care about school choice. Public schools are sacred, even if a lot of them send their kids to private schools. The Democrats hate the Constitution (it represents old, racist white men again). They only believe in the Bill of Rights when it suits them. The "heads of Google, Facebook and eBay" know that the Democrats will provide them with favors more than Republicans.
Rand is on track with opposing the war on drugs in California. They will like that. Fewer wars? They will like that too, as long as that includes full support of Israel. Defending freedom of the press will sell here. But the Democrats already take those positions for the most part, even if they are just paying lip service.
What will help in getting the California vote in a national general election is offering something that the Democrats don't already offer. A GOP candidate being from California might work. Other than that, good luck.