Marijuana Legalization in Canada and Michigan

[Canadian Visitor]

https://www.cnn.com/2017/02/16/us/bo...rnd/index.html

Relevant passage:
If you're a US citizen:
You cannot be denied entry into the United States, but you might be delayed.
"For citizens, and likely for many green card holders, border agents can inconvenience you, but eventually, they're going to have to let you back into the country," Wessler says.

[Wesley Mouch]

https://www.cnn.com/2017/02/16/us/bo...rnd/index.html

Relevant passage:
If you're a US citizen:
You cannot be denied entry into the United States, but you might be delayed.
"For citizens, and likely for many green card holders, border agents can inconvenience you, but eventually, they're going to have to let you back into the country," Wessler says.

CV, you said it all in your posts. I'm amazed how many people do not understand that you have an absolute right of return to your home country, if you are American. It is not conditional on anything whatsoever. Its your country.

But as has been pointed out, it may be an unpleasant experience. They can delay your entry without review for quite a while, and detain you in a charming little cell without right to counsel. They can dismantle your car. They can probe your body. They can confiscate anything you can't have prove left the USA with you.

But you have a right to enter ultimately. But the road to re-entry may be less than pleasant, and might involve being charged with crimes under American laws.