Actually, TRUMP cancelled the second debate.
They said they would do it digitally and Trump emphatically refused to do that.
https://www.nytimes.com/2020/10/09/us/politics/biden-nevada-debate.html
And Trump is again acting like a scared pussycat and running away from the Primary Debates.
https://www.pbs.org/newshour/politics/trump-says-he-wont-be-participating-in-any-gop-presidential-primary-debates
And the RNC, (With an R, not a D) is running with their tails between their legs for the general election presidential debates.
https://www.politico.com/news/2022/04/14/rnc-boycott-commission-on-presidential-debates-00025350
Because Republican candidates nowadays are cowardly, do-nothing, staring off into space, crybaby, nincompoops.
I miss MY Republican Party before the Trump Train made all the good ones bail like RATS on a sinking SHIP!