According to federal law, which of the following pieces of legislation addressing illegal immigration would state governments be prohibited from enacting?
a.
an arizona bill that allocates more money to local law enforcement to combat illegal immigration.
b.
an oregon law that increases the minimum prison sentence for illegal immigrants above the federal minimum.
c.
a florida measure appealing to the federal government for more coast guard personnel to curb illegal immigration along the gulf.
d.
a colorado law requiring all businesses operating in the state to provide proof that their employees have social security numbers or valid visas.

“dear sir: it is with great reluctance, i trouble you on a subject, which does not fall within your province; but it is a subject that occasions me more distress, than i have felt, since the commencement of the war; and which loudly demands the most zealous exertions of every person of weight and authority, who is interested in the success of our affairs. i mean the present dreadful situation of the army for want of provisions, and the miserable prospects before us, with respect to futurity. it is more alarming than you will probably conceive, for, to form a just idea, it were necessary to be on the spot. for some days past, there has been little less, than a famine in camp. a part of the army has been a week, without any kind of flesh, and the rest for three or four days. naked and starving as they are, we cannot enough admire the incomparable patience and fidelity of the soldiery, that they have not been ere this excited by their sufferings, to a general mutiny or dispersion. strong symptoms, however, discontent have appeared in particular instances; and nothing but the most acitive efforts every where can long avert so shocking a catastrophe.” what’s the central idea?