IOW, they're too small to make a difference AND are responsible for handing yesterday's election to the Democrats?
They're too small and unreliable to help you win. It's like holding slime, they'll slip away no matter what you do. Better to go after the mushy middle than the couple of Libertarians.
But I never claimed that the L's lost the Montana race. Maybe they did, but what it would have taken to bring them on board would have either reduced Burns' total to 10% or not been sufficient for their unappeasability.