Gov. Rick Perry is showing no signs of ending his presidential bid in the face of low poll numbers, and is instead investing $1 million in ad time in Iowa in advance of the caucuses three weeks away. A new survey done for the Perry campaign shows him in third place in Iowa but also found that the race is far from settled: 67 percent of respondents admitted that they may change their mind before the vote, and with 67 percent of likely caucus-goers saying they view him favorably, Perry may be the beneficiary of those that are on the fence or not strongly committed to another candidate. Most conversation in that campaign has focused on Perry's newest commercial.