Yes Michael, back in the days of "many nails, one hammer" The Teamsters did a good job of giving truck drivers some power. Unfortunately, they took it a little too far and forced many of the carriers that their members worked for into bankruptcy. (de-regulation also helped).
It would be interested to see the number of members the Teamsters has now compared to back in their glory days. I am guessing their numbers are down by about 80%.