The House only elects the President if no candidate wins 270 electoral college votes. That simply can't happen unless someone other than Clinton or Trump wins 1 or more electoral college votes. To win votes, a 3rd party candidate would have to receive more votes than both Clinton or Trump in a State (or in the case of a couple of states which split up their votes into districts, by winning g such a district). Getting 9% of the vote won't do that.
What a 3rd party candidate might do is take enough votes from either Trump or Clinton to swing a state one way or the other. Unfortunately, it's most likely that they'll syphon off votes from Clinton. Disaffected Sanders voters might go Green or Libertarian. Never Trump Republicans might prefer to vote for the Libertarians or for the Never Trump candidate. If it were only a 2 horse race, many would opt for Clinton.
What a 3rd party candidate might do is take enough votes from either Trump or Clinton to swing a state one way or the other. Unfortunately, it's most likely that they'll syphon off votes from Clinton. Disaffected Sanders voters might go Green or Libertarian. Never Trump Republicans might prefer to vote for the Libertarians or for the Never Trump candidate. If it were only a 2 horse race, many would opt for Clinton.