On July 31, Ohio Governor John Kasich spoke in Keene, New Hampshire. He was asked whether he feels general election presidential debates should include more than two candidates. He responded, “I don’t know; I haven’t thought about it.” Then he asked the questioner who the third candidate might be. The reporter who asked the question mentioned the Libertarian and Green Parties.

Kasich then started to make a reference to the 2014 gubernatorial election in Ohio, where three candidates were on the ballot, Kasich, the Democratic nominee, and the Green Party nominee. He started to say that he had some discussions about whether to include the Green, but trailed off, and said, “I don’t know. I’ll see how serious they are.” Actually, the Democratic Party nominee for Governor of Ohio in 2014 was willing to include the Green Party nominee, and it was Governor Kasich who refused to include her.
Use this link to watch the video. Click on the 5th segment (the segments are listed on the right edge). The question about the general election debates starts at 52 seconds in. Thanks to Darryl Perry for the link.