A big portion of President Obama's wealth is invested in federal debt, according to a financial disclosure form released Monday. The president and First Lady Michelle Obama had assets valued between $2.8 million and $11.8 million in 2010. And between $2 million and $10 million of their assets are invested in super-safe U.S. Treasury securities, according to the disclosure form. That's up from $1.5 million to $6 million reported invested in Treasury notes and bills in 2009. They also have between $350,000 and $800,000 invested in IRAs and other retirement funds, according to the form. And the couple has between...