President Obama may not be doing too badly in the personal-finance department, but Mitt Romney is in a whole new stratosphere. After crunching numbers for a month, Forbes has estimated his net worth to be $230 million, which would make him the wealthiest president in US history. Of that, the biggest amount—$91 million—is in the form of debt securities, writes Edwin Durgy. He also has $18 million in real estate and $16 million in cash. Click for the full breakdown of Romney's 184 assets. (More Mitt Romney stories.)