With 40 million people in California and with California a one-party state thanks to Dem/GOPe immigration policy with probably a 20+% Dem advantage, any national poll that shows Clinton +1 means that Trump is ahead in the rest of the country excluding California.
You may be correct. Most recent Mexicornia poll, Survey USA, Beast 56, Trump 30, so Beast +26. IBD today, Beast +1. California is 10% of the vote cast, therefore, Trump +2 outside California. Nightmare scenario. Because of Cali lopsided margin Trump 300 EV, Clinton pop vote by 500k- 1 m.