In other words, you don't know. In other words, we should require visas from countries that don't require them of us. Sounds like a plan. Let's add a layer of bureaucracy and do nothing for security. /sarc
You're right, I did not know.
Sorry but you can't sue me for that.
And, yes, I do think we should require a visa from everyone stepping across the border. Not to say that some do in fact have a reason to come across repeatedly, but it ain't like you had to renew the things every wednesday.
I want fingerprints and a confirmed residence, sponsor, or place of business.