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5. Al Gore

Current estimated net worth: $100 million

Al Gore was vice president in the Clinton administration. He ran for president in 2000, and it was widely assumed that he would win. However, the contest was much more competitive than expected, and in the end he won the popular vote but lost in the electoral college to former Texas Gov. George W. Bush.

Rather than pursue the presidency again in 2004, Gore left electoral politics. He shifted his focus to the environment, and in 2006 he was the subject of “An Inconvenient Truth,” a film based on his book about climate change that was one of the most popular documentaries ever made.

Gore’s estimated net worth is $100 million, much of which was amassed in the private sector after he left office. His wealth includes real estate holdings, lucrative speaking fees and the stock options from his tenure on the board of Apple.

Mike Nelson | AFP | Getty Images