Romney only ran in the presidential race once, although his campaign machine is not approaching 24 years or six presidential cycles in age.
He spent 50 million of his personal dollars and was a record breaking spender, with a huge organization, in his 2008 presidential primary campaign.
Remember that Romney didn't become a republican again until October of 1993.
In the early 1990s Romney was supporting only democrats, and fund raising for democrats and Planned Parenthood, and voting democrat, after Reagan's ascendancy had driven him from the GOP.