Union Pacific (UNP) CEO Jim Vena says the American economy remains resilient — even if some cracks are starting to show. "The consumer, from everything we see, is still strong at this point," Vena told Yahoo Finance at Ford's Pro Accelerate conference in Detroit, Mich. "They are still out there spending, they're still out there moving." Pressed on whether a slowdown is underway, Vena acknowledged weakness in parts of the economy, but emphasized broader strength. "In specific segments, there is, you can ...