David Muir will anchor "ABC World News" from the battleground state of Florida on Sunday, October 21. The broadcast will originate from Boca Raton, the site of the final Presidential debate on Monday evening. Muir, who has been reporting from the campaign trail since the fall of 2011, will be talking with Florida voters as part of his continuing series, "The Undecideds."

ABC News Chief Political Correspondent George Stephanopoulos, anchor of "This Week" and "Good Morning America," as well as members of ABC's powerhouse political team will join Muir to preview Monday's debate. In addition, Muir will speak with Nate Silver of the FiveThirtyEight blog published by the New York Times.

"ABC World News with David Muir" airs on the ABC Television Network, check your local listings. Michael Corn is the executive producer of the broadcast. Follow David Muir and the "World News" team online: @DavidMuir; @ABCWorldNews; facebook.com/WorldNews.

-ABC-