There is agitation abroad in the land to put a likeness of Ronald Reagan on the face of the $50 bill, supplanting that of Ulysses S. Grant, Civil War hero and two-term president of the United States. Grant was a mixed bag; presidents almost always are. Consider Andrew Jackson, the face on the $20 bill, and nowadays a most familiar face since the advent of cash machines. Next time you’re in Oklahoma, why don’t you ask a Cherokee, probably an older one, not attached to an iPod, about Andrew Jackson.