

Lee Iacocca, the former Chrysler CEO, says he lacked the temperament for politics. 'I'm candid to a fault, not a diplomat,' he once wrote. Business Wire/File
Carly Fiorina, the former CEO of Hewlett-Packard, lost a US Senate race in California in 2010. AP/File
Publishing executive Steve Forbes has twice sought the Republican nomination for president, in 1996 and in 2000. AP/File
Texas billionaire Ross Perot ran for president twice as a third-party candidate, first in 1992, when he garnered 19 percent of the popular vote, and again in 1996. Reuters/File
Donald Trump, the New York real estate mogul and TV personality, has flirted with running for president in 2012. Reuters/File
Meg Whitman, the former CEO of eBay, spent $144 million of her own money in a losing bid in 2010 to be governor of California. Reuters/File
Paul O'Neill, the former CEO of Alcoa, was fired as President Bush's treasury secretary after a public tiff with the White House. He became a harsh critic of the Bush administration. Andy Nelson/The Christian Science Monitor
Herman Cain, the former head of Godfather's pizza, was briefly the front-runner for the Republican nomination in late 2011. But he exited the race before the first primary took place after allegations of sexual misconduct surfaced. AP/File