Retailers are facing a shipping squeeze, and the trucking industry just can't keep up. According to the American Trucking Associations, there's a shortage of roughly 50,000 truck drivers across the country. And it's hitting both businesses and consumers in the wallet. Companies are complaining about how the driver shortage is impacting their business. Meanwhile, the cost of convenient shipping is starting to catch up with consumers. Amazon recently hiked its Prime membership to $119 a year from $99 a year. The retail giant said one of the reasons for the price jump was increased shipping costs. But the driver shortage...