ANCHORAGE, Alaska — The defeat of Republican U.S. Sen. Lisa Murkowski by an upstart fiscal conservative in Alaska's GOP primary could mark a significant shift for a state that has so long relied on federal pork to survive. The outcome was also an unexpected blow to the seniority Alaska has enjoyed in the Senate.Even as the far northern state stubbornly adheres to its reputation for independence, it relies more heavily on federal spending than any other state, thanks largely to congressional powerhouses such as the late Republican Sen.