Well the Feds only monitor International borders. And some states do allow people who come from other states to purchase cannabis products, and if you're legal to carry in both states, then nobody is going to harass you at the border. For instance there should be no problem going from CA to OR. since both now have legal recreational, so long as you are within the weight limit (one ounce in CA). You don't even need a Dr. recommendation.No. Legalization is only on the state level. Its still illegal on the federal level. Purchasing, or shipping any cannabis plants, plant matter, concentrates etc... across state lines is still illegal. Not to say that it isn't being done everyday