Don't worry S/H.

While I was with Immigration, common border policy was a frequent subject of discussion. We routinely refused between 8 and 10 percent of visitor visa applicants at New York--all of whom had status in the USA (we didn't even talk to people applying for visitor visas who weren't legally in the US).

The reality is that there are zero prospects of a common border policy in the near future.

We are much more stringent that americans in our visa issuance practices--largely because we pay much more out of the public purse for every refugee claimant, whereas the US allows them to move into the underground economy, where they really don't cost the Treasury anything.

Further, our visa exempt lists are too divergent. The biggest anomolies are Argentina (visa free access to the US, and one of our largest group of refugee seekers at the US border), and Korea (visa free access to Canada, big enforcement problem for the americans).

Until these issues can be resolved, a common border policy is decades away.