From WaPo interview transcript:

RUCKER: What would you negotiate for? Do you want for example Gary Johnson and Jill Stein?

TRUMP: No because they’re not getting any . . . I’d rather have head to head and right now they’re not getting any numbers. She’s doing better than he is, but right now in some polls she’s actually not doing badly.

RUCKER: There were some Jill Stein supporters in Philadelphia.

TRUMP: She doesn’t get media coverage only because people perceive her as hurting Hillary Clinton. I’m not sure that that’s true.

RUCKER: I don’t know about that.

TRUMP: People perceive her as hurting Clinton. I think she’s doing very well. I don’t think the numbers will be good enough for them to be in the debate.