Politicians lean on the financial industry to target activities they don’t like.The first credit card processor to announce plans to track purchases at gun shops is Discover Financial Services. The company hints that its competitors, specifically Visa, MasterCard, and American Express, are on the same schedule to implement a controversial gun-specific merchant category code announced last year. Given that the ideologically charged bank behind the new code has big plans for targeting gun purchases you can expect more fireworks to follow. "Discover Financial Services, a provider of credit cards, told Reuters it will allow its network to track purchases at...