LEIPER'S FORK, Tenn. - A Williamson County gun dealer recently learned a credit card processing company no longer wants to do business with him. "We go through all the hoops and all the steps and at the end of the day it's still a struggle to get the same services anybody else would," said Nick McMillan. He owns Leiper's Fork Firearms. It is a small gun dealership McMillan runs out of his home. "We're set up like a business, just like every other small business out there," he said. McMillan is a has a federal firearms license and is heavily...