America has always been made stronger -- economically, democratically, and as a world leader -- by welcoming new citizens and allowing them to lend us their talents, their energy, and their new ideas. That's how we succeeded in the 20th century -- and it is the recipe for success in the 21st century as well.
We can just make stuff up with aplomb. One day we say the market rises as "investors cheer" good employment numbers; the very next day we attribute the decline to "structural problems" and look forward to a long decline! Were those structural problems not present yesterday when investors were cheering?