Final answer:
Ronald Reagan, as governor of California, most notably changed the state's political landscape and had a profound impact on economic policies and environmental regulations.
Step-by-step explanation:
As governor of California, Ronald Reagan had a significant impact on the state's political landscape. While he enacted changes across various areas, his administration is noted for its efforts in economic policy as well as environmental regulations. Despite his initial criticism of big government, Reagan approved the largest budget in California's history and increased taxes occasionally, reflecting a more pragmatic approach to governance. He was also involved in deregulating industries and weakening the power of labor unions. Importantly, he loosened environmental regulations through the less strict enforcement of pollution control by the Environmental Protection Agency and relaxing restrictions on logging and drilling for oil on public lands.