Birmingham -- Poor and conservative, the state of Alabama seemed like the perfect place for companies to do business without having to deal with labor unions. That is, until a handful of Amazon employees stood up to the world's richest person and demanded representation at the bargaining table. It comes to a head this week: Monday is the deadline for employees at an Amazon warehouse in Alabama to vote on establishing the first union on US soil at the massive tech company. The case is being closely watched because it could pave the way for further unionization in the United...