“That Congress has the power to regulate the currency of the country can hardly admit of doubt; and that a judicious measure to prevent the deterioration of this currency, by a reasonable taxation of bank circulation or otherwise if needed, seems equally clear. Independently of this general consideration, it would be unjust to the people at large to exempt banks, enjoying the special privilege of circulation, from their just proportion of the public burden.” – Abraham Lincoln, “To the Senate and House of Representatives”