On Tuesday night, 63.2 million U.S. viewers watched the second presidential debate between Senators John McCain and Barack Obama.
The TV audience for the senators’ second meeting easily surpassed that of their first debate, which drew an audience of 52.4 million on Friday, Sept. 26.
During the previous presidential campaign, 46.7 million viewers tuned in for President Bush and John Kerry’s second debate on Oct. 8, 2004. 
See more historical debate ratings.

CBS’s “NCIS” was the number one-ranked primetime telecast on broadcast TV for Tuesday, October 7, 2008, drawing an audience of almost 16.3 million average viewers.
ABC’s special presentation of “Dancing With The Stars” claimed second place, with almost 15.1 million viewers.  ABC’s post-debate analysis of the second McCain/Obama presidential debate rounded out the top three, with just over 9.9 million viewers.
Post-debate coverage on NBC, CBS, and FOX also made the top ten.

RANK
NAME
NETWORK
VIEWERS (P2+)

1
NCIS
CBS
16,288,000

2
DANCING W/STARS RESULT SP(S)-10/07/2008
ABC
15,065,000

3
VOTE2008:ANALYSIS-TUE(S)-10/07/2008
ABC
9,917,000

4
DECISION ‘08:PRES ANALYS2(S)-10/07/2008
NBC
8,349,000

5
CAMPAIGN ‘08-DEBATE ANL-2(S)-10/07/2008
CBS
7,951,000

6
BIGGEST LOSER 6
NBC
7,265,000

7
HOUSE
FOX
6,365,000

8
FUEGO EN LA SANGRE TUE
UNI
5,634,000

9
CUIDADO CON EL ANGEL TUE
UNI
4,637,000

10
FOX NEWS: …