All of the options listed are powers of the federal branch of government, granted under the Constitution, except "regulate elections," and "set up town governments," since regulating elections is mostly up to the state (although the federal government can technically intervene) and setting up town governments is a local issue.
Keeping guns out of the hands of freed slaves
Spain which was not on the gold standard did not have a substantial decline from 1929 to 1933 as the US,Germany and many other countries endured a Contraction.
