The Commission on Presidential Debates canceled the second presidential debate, which was scheduled to take place on Thursday (source). The commission cited statements made by candidates’ campaigns regarding their “willingness to participate in a virtual debate,” and noted that each campaign “has announced alternate plans for that date.” The final presidential debate is currently scheduled for October 22.
More context: The CPD announced plans to hold the second debate virtually last week (citing health concerns). Shortly thereafter, President Trump said that he would not participate if the event was held virtually (confirmed by a statement from his campaign). The Biden campaign subsequently issued a statement saying that they were open to participating in a virtual campaign. Both candidates are now expected to hold campaign events on Thursday.