The Biden campaign also issued a statement, saying that the Democratic candidate “looks forward to participating in the debates set by the commission, regardless of who the independently chosen moderators are.”
The selection of Mr. Wallace may set off Mr. Trump, who has criticized the Fox News anchor’s coverage in the past, although the president also sat for an interview with him at the White House in July. Last week, at a rally in New Hampshire, Mr. Trump taunted Mr. Wallace for “a lack of talent” and compared the anchor unfavorably with his father, the “60 Minutes” legend Mike Wallace, who died in 2012.
In August, Mr. Trump’s lawyer, Rudolph W. Giuliani, sent a list of 24 journalists “for consideration” by the debate commission. Roughly 40 percent of his suggestions were affiliated with Fox News and Fox Business. Mr. Wallace’s name was not among them.
No one from Mr. Giuliani’s list was ultimately selected.
No journalist from CNN — the news organization that is arguably the most frequent target of Mr. Trump’s attacks on journalists — made the cut this year. One of the network’s anchors, Anderson Cooper, served as a co-moderator in 2016.
Mr. Scully, of C-SPAN, is a respected broadcaster whose network is known for coverage that prizes nonpartisanship over punditry. (He may be familiar to some viewers from his call-in program, “Washington Journal,” in which he listens impassively as callers express lengthy political opinions.)
Ms. Welker, of NBC News, is the second Black female journalist to serve as solo moderator of a presidential debate, after Carole Simpson of ABC in 1992; she has reported on the White House since 2011. Ms. Page, of USA Today, is a veteran White House journalist who has covered six presidential administrations and wrote a biography of Barbara Bush.
Each debate is 90 minutes and is set to air at 9 p.m. Eastern, with no breaks for commercials. An average of 74 million people watched the three matchups between Mr. Trump and Hillary Clinton in 2016, by far the candidates’ biggest live audience of the campaign.