was it the war in Afghanistan that brought the Russians "to their knees", or the cold war? Russia did not have the financial resources (income) from a capitalistic economy to keep up with the US.
while the military is a huge expense for the US, it is not the largest and what price do you put on human rights? As the US moves away from the capitalistic structure mentioned above, they too will not have the resources to be the "world's police"
yes to troops on the border to protect against illegal immigrants. Even put them on the Northern border to protect from illegal immigrants making their way into Canada