#1 is good.
#2 is anti constitutional, and would never pass (sterilization), but otherwise sounds good. Similar to Canada.
#3 would require an amendment to an old law that states that as soon as you set foot on US soil, you are legitimately able to claim asylum.
#4 would go against NAFTA (North American Free Trade Agreement), and possibly a bunch of others. Being Canadian, I thought NAFTA was a bad idea, but that moron Mulroney passed it anyways, without any protest or amendments. The result is that US companies are now able to sell some products openly in Canada, including Quebec which has a law that states that all labeling must be in French, at least, but defeated by NAFTA. So US products either make it unscated, or don't make it at all in Quebec.
. It's otherwise good.
#5 With the US being one of the richest countries in the world, it does bear a certain responsability in the world, wether the help is wanted or not. Is it taking it too far? Maybe. I agree that it seems rather silly for me to see us send aircraft carriers halfway around the world, but have to drive by a homeless man on my way to work in the morning.
Strangely, what you propose (infrastructure build/expansion) is one of the best things a government can do. Hitler is a prime example of this: his first mandate was to take the (then) poor country of Germany, and rebuild it into an economic super power. He took EVERYONE that was unemployed, and had them build highways everywhere. The result was increased trade. He also promoted the education system, as Germany used to be the chemical super brain of the world. Now it's well known for it's excellent engineering. (Never mind that propaganda was part of the school books, and that manufacturing plants could easily be converted to produce machines of war!).
Clinton's I2 (Internet 2) might be that superhighway of the future.