SIMON LEWIS WHEN the U.S. Congress passed a pandemic aid bill a week ago, Meghan Meyer, a single mom from Lincoln, Nebraska, thought she would get some respite from the daily struggle to feed and house her two kids during an unprecedented health and economic crisis. But the next day President Donald Trump declared the long-awaited relief package "a disgrace" and said he would not sign it into law, decrying some of its spending measures while also demanding it include bigger stimulus checks for most Americans. By the weekend, he had refused to budge. That leaves Meyer, who has been…