Sen. Lisa Murkowski, Alaska Republican, trails little-known challenger Joe Miller (right) by 1,668 votes in the GOP primary with about 14,000 absentee and early votes still to be counted this week.

Sen. Lisa Murkowski, Alaska Republican, trails little-known challenger Joe Miller (right) by 1,668 votes in the GOP primary with about 14,000 absentee and early votes still to be counted this week.