Defenders of legislative term limits announced a campaign today to counter a Legislature-proposed amendment to give state lawmakers more time in office. Proposed Amendment One would double the time House members can serve to six two-year terms and allow state senators to serve three four-year terms instead of the current two terms. The proposed amendment will be on the November general election ballot. Save Term Limits organizer Karl Kimball called the amendment an attempt to thwart the will of the people. Amendment 73, passed by voters in 1992, limited House members to three two-year terms and senators to two four-year terms. Save Term Limits spokesman Tim Jacob said the group`s fund-raising efforts would be aimed primarily at running television ads. Defenders say term limits made room in the Legislature for fresh ideas by dismantling the seniority system and ridding the body of entrenched power brokers. A coalition of business groups, labor, trial lawyers, local government organizations and others is supporting the proposal to extend term limits.