Green-Party nominee Jill Stien got only little over 1% of the popular vote, but her vote count in Pennsylvania, Michigan, and Wisconsin was greater than Trump’s margin of victory in those states. Presumably most of her voters would have voted for Clinton instead of Trump if Stein had not been on the ballot, and those three states decided the election in the electoral college.
State-funded RT ran this video interview with Stein just before the election:
There is also evidence that the Russian government aided the Stein campaign:
Did Stein cost Hillary the election?
How important was Russian support for Stein in the election results?