President Obama's net worth could stand at a hair under $7 million ... or just $1.8 million. That range comes via his financial disclosure reports released yesterday, and USA Today sums it up perfectly: The Obamas "are wealthy, but it's uncertain just how wealthy." Their assets are documented on an eight-page form that calls for ranges rather than specific figures; they include Treasury notes and index funds. As for liabilities, the couple has just one: between $500,001 and $1 million owed on the 30-year mortgage on their Chicago home. Joe Biden made the same disclosure, and his wealth remains considerably smaller: His assets range from $120,000 to $550,000.