cotton less profitable, and Arizona's production steadily declined. Manufacturing employment jumped from 49,000 in 1960 to 183,000 by 1985, with half the workers in well-paid positions. High-tech firms such as Motorola, Hughes Aircraft, Goodyear Aircraft, Honeywell, and IBM had offices in the Phoenix area. By 1959, Hughes Aircraft had built advanced missiles with 5,000 workers in Tucson. Political leadership Despite being a small state, Arizona produced several national leaders for both the Republican and Democratic parties. Two Republican Senators were presidential nominees: Barry Goldwater in 1964 and John McCain in 2008; both carried Arizona but lost the national election. Senator Ernest McFarland, a Democrat, was the Majority Leader of the U.S. Senate from 1951 to 1952, and Congressman John Rhodes was the Republican Minority Leader in the House from 1973 to 1981. Democrats Bruce Babbitt (Governor 1978–87) and Morris Udall (Congressman 1961–90) were contenders for their party's presidential nominations. In 1981 Sandra Day O'Connor became the first woman on the U.S. Supreme Court; she served until 2006. Retirement communities Warm winters and low cost of living attracted retirees from the so-called snowbelt, who moved permanently to Arizona after 1945, bringing their pensions, Social Security, and savings with them. Real estate entrepreneurs catered to them with new communities with amenities pitched to older people, and with few facilities for children. Typically they were gated communities with controlled access and had pools, recreation centers, and golf courses. In 1954, two developers bought 320 acres (1.3 km2) of farmland near Phoenix and opened the nation's first planned community dedicated exclusively to retirees at Youngtown. In 1960, developer Del Webb, inspired by the amenities in Florida's trailer parks, added facilities for "active adults" in his new Sun City planned community near Phoenix. In 1962 Ross Cortese opened the first of his gated Leisure Worlds. Other developers copied the popular model, and by 2000 18% of the retirees in the state lived in such "lifestyle" communities. Environmental issues The issues of the fragile natural environment, compounded by questions of water shortage and distribution, led to numerous debates. The debate crossed traditional lines, so that the leading conservative, Senator Barry Goldwater, was also keenly concerned. For example, Goldwater supported the controversial Colorado River Storage Project (CRSP). He wrote: Water issues were central. Agriculture consumed 89% of the state's strictly limited water supply while generating only 3% of the state's income. The Groundwater Management Act of 1980,