February 27, 2004 Heller won't challenge ReidBy Kirsten SearerLAS VEGAS SUNSecretary of State Dean Heller has decided not to run for the U.S. Senate, meaning that Richard Ziser could be the last major Republican figure planning a run against Sen. Harry Reid. Heller said consultants told him he would have had to run a negative campaign to pose any viable challenge to Reid, who plans to raise $10 million for the November election. "If you can't match the dollars that an incumbent has, you need free media," Heller said. "And the way to get free media is you have to...