Labor Day is considered the traditional “kick-off” for the general election campaign. Iowa Republican Party executive director Dee Stewart says voters are beginning to think about the presidential race.Both major party presidential candidates campaigned in Iowa in August, and Stewart expects more visits from both Bush and Gore.Iowa Democratic Party Chairman Rob Tully also believes the candidates will come calling.While the candidates are using new technology — like the Internet, Tully believes the candidates will fall back on traditional campaign tactics.Both Bush and Gore are running broadcast ads in Iowa already — 64 days before election day.