WASHINGTON — The bad economy is good for President Obama and Democrats as they try to reinvent the health care system with scant Republican support. That is the conclusion of many Congressional Democrats, who say that economic insecurity and high unemployment stoke public support for their proposals to guarantee insurance for millions of Americans. Representative Jim McDermott, Democrat of Washington, said this was one of the biggest differences between the health care wars of 1993-94 and the battle today. When Bill and Hillary Rodham Clinton fought for universal coverage, Mr. McDermott said, the economy was on an upswing, in the early stages of a 10-year economic expansion, which proved to be the longest in American history. Today, by contrast, the economy is weak. Americans have struggled through the worst recession in decades. The unemployment rate is at a 26-year high. “The mentality in the country is different,” said Mr. McDermott, a psychiatrist who has served in Congress for two decades. “In 1993, we were talking about the uninsured as ‘them.’ Now it turns out this is for us. When a bank like Washington Mutual in Seattle lays off 3,000 people, they lose health insurance. Millions of people with insurance are asking, ‘What if I lose my job?’ ” Continua…