Even former space executives aren't buying Newt Gingrich's wacky proposals. The former speaker of the House went above and beyond the typical pandering while campaigning on Florida's Space Coast this week, promising to create space colonies and spearhead a mission to Mars if elected president. Unfortunately for Newt, these outlandish proposals didn't win over even some of those most invested in the space program. In an open letter, eight former space executives wrote: "Restoring the U.S. space program to greatness will require the leadership, management skill, and commitment to American exceptionalism possessed by only one candidate in this race: Mitt Romney." The executives praised Romney's realistic approach to the space program. In Thursday night's debate, Romney criticized Gingrich's expensive proposals, suggesting that he was simply "going state to state and promising what people want to hear, promising billions, hundreds of billions of dollars to make people happy."