This is not a mystery in the least; Alaska is not very populous. (If Manhattan had the population density of Alaska, it would contain 37 people.) But nonetheless, particularly for the very real possibility that Sullivan could comprise 1 percent of half of Congress, it is a remarkably small number. The Republican nominee in Hawaii, Cam Cavasso, only got about 25,600 votes. But he doesn't have a chance of winning. Sullivan does.
Overall, 43 Republican candidates for the Senate got more votes than Sullivan. For every American that wanted Dan Sullivan to go to the Senate, there were nearly seven that thought eccentric Rep. Steve Stockman (R-Tex.) should go.
Another way of looking at it: If Sullivan carried his 36,000 votes into any other primary, he would have lost nearly all of them. He would have come in fifth in Texas and sixth in Georgia.
One last comparison: Much was made of the turnout in Virginia's 7th Congressional District, where former House majority leader Eric Cantor (R) lost to upstart David Brat. Only about 5 percent of the district was what it took for Brat to win his seat, where he'll represent 1/435th of the U.S. House. Brat won with about 180 votes fewer than Sullivan needed to take the whole state of Alaska.
The moral of the story is this: If you have 40,000 friends and family willing to move to any state to vote for you, move out of Texas. There's plenty of space in Alaska, and those votes could make more than enough difference.