California Marijuana Legalization

In 2016, Californians voted to legalize recreational marijuana. The referendum went into effect at the start of 2018. California is now the largest and most populated state to have legalized marijuana. How will this effect legalization efforts across the United States?

Source: https://www.huffingtonpost.com/entry/california-marijuana-legalization-war-on-drugs_us_5a3c1303e4b025f99e15b738