Amazon is now under scrutiny from both sides of the aisle, as Sen. Bernie Sanders echoed President Donald Trump's criticism of the e-commerce giant in a tweet this week. "You know what Amazon paid in federal income taxes last year? Zero," the 2016 Democratic presidential hopeful said in a tweet Monday evening. The Vermont senator linked to a Forbes article, which pointed to CEO Jeff Bezos' rise in net worth as Amazon's stock benefited from a huge earnings beat last week. Bezos, the world's richest man by Forbes' estimates, added $9 billion to his own value as the stock shot...