If Hussein is knocked out of it it will go to Biden, if he gets sufficient Electoral votes. It is not really guaranteed that the Electors will all vote as they are instructed once the situation is changed by the presumptive winner being removed from contention. Do their instructions take this sort of thing into account?
The Electors are chosen by the Party of the Candidate. They will votes as they are instructed if they want to continue with that party. Since the Obama electors have a large 'cushion' above 270 a few strays won't be an issue. If the democratic party consensus is to go with Hillary as Prez, than that will happen.