There have been quite a few wolf attacks on humans in North America. The reason the wolf lovers always state, "there has never been a documented wolf attack of a human in North America" is because they are playing with words in lawyer speak. There are four conditions to be met to be a 'documented' wolf attack--that is then recognized by government agencies.
1. The wolf has to be killed, examined and found to be healthy.
2. It must be proven that the wolf was never kept in captivity in its entire life.
3. There must be eyewitnesses to the attack.
4. The person must die from their wounds (bites are generally not considered attacks according to the biologists).
Even the woman that was killed while jogging in Alaska hasn't been 'documented' as a wolf attack (as far as I know). And President Clinton never lied because of whatever the definition of is...is. I've only been able to find one attempted wolf attack for Washington (not including Native Americans). If I can find the story I'll post it. But from fuzzy memory here is a summation: 1920's a farmer from the Sequim area went to investigate a loss of livestock which led him to an area near the forks of the Dungeness and Gray Wolf Rivers. Two or three wolves chased him up a tree and stayed in the area trying to get him. The next day concerned neighbors went to look for him and saw his situation. They killed the wolves, which were believed to be the last wolves on the Olympic Peninsula.