ridiculous

My points are not in support for or against Obama. I just struggle with flawed arguments. So, as to the specific nations mentioned above ... you realize you are comparing a democracy to mostly communist or dictatorships.

North Korea -- dictatorship that is isolated and feels threatened by every country it borders.
Iran -- technically it is theocratic republic, but it is also an authoritarian structure so there are very few liberties allowed.
Afghanistan -- it is still a war zone. Besides, it is clear that its border actually are quite porous.
Saudi Arabia -- is an absolute monarchy that enforces a strict religious doctrine.
China -- is a communist form of government.
Venezuela -- while technically a republic (similar to ours) it operates much closer to a dictatorship form.
Cuba -- another communist form or government. It is also a small, impoverished island so it is not like it is a good destination for opportunities for illegal immigrants or an easy one to reach.

In essence, you comparing the U.S. to very restrictive countries, which skews your comparison. You should compare countries that are democracies. Most democracies have an illegal immigration problem.

Illegal immigration is not a new problem. It has been a problem for decades and decades. It has continued through both Republican and Democrats controlling all branches of the federal government, yet none of them resolved it.

I think it is easiest to compare countries such as the U.S. and Canada. Seattle has many illegal immigrants. Just up the road, Vancouver does not. Why? Because it is illegal to employ an illegal immigrant in Canada and the business is the one heavily fined for doing so. The result, no jobs for illegals. Therefore, very few illegal immigrants.

In the U.S. we can't/won't do that due in large part to political contributions. Too many of our businesses rely on employing illegal immigrants cheaply to allow it. Big businesses too. Think IBP (midwest slaughter houses) to Perry Homes to restaurants to garbage collection.