On August 2, Donald Trump sat for an interview with a Washington Post reporter. Rick Hasen has abstracted out the part of the conversation in which Trump is asked if he wants either or both Gary Johnson and Jill Stein in the debates. Trump said, “No”. See Hasen’s post here.
It is surprising that Trump says that Stein polls better than Johnson. All of the 4-way polls listed for the last few weeks at Real Clear Politics show that Johnson polls ahead of Stein.