McDonald's (MCD) on Wednesday reported US same-store sales that topped forecasts for the second straight quarter as it continues to focus on value offerings amid what the company called a "challenging environment." The company reported that its US same-store sales increased 2.5% over the same period last year, driven by higher check growth. That's more than the 2.2% Wall Street expected and in line with the 2.5% growth seen in the prior quarter, according to Bloomberg data. Global same-store sales increa ...