Washington -- Health care may have been the last big bang of the Obama presidency. With ferocious speed, the financial crisis, recession and efforts to combat the recession have swung the U.S. debt from worrisome to ruinous, promising to handcuff the administration. Lost amid last month's passage of the new health care law, the Congressional Budget Office issued a report showing that within this decade, President Obama's own budget sends the U.S. government to a potential tipping point where the debt reaches 90 percent of gross domestic product.