Now playing
00:59
Tim Kaine attacks Trump's 'insult-driven' campaign
vice presidential debate mike pence v donald trump origwx allee_00000000.jpg
vice presidential debate mike pence v donald trump origwx allee_00000000.jpg
Now playing
02:14
Actually, Mike Pence, Trump really DID say that
Patrick Semansky/Julio Cortez/AP
Now playing
01:33
The contentious vice presidential debate in 90 seconds
Republican vice presidential nominee Mike Pence speaks as Democratic vice presidential nominee Tim Kaine and debate moderator Elaine Quijano listen during the Vice Presidential Debate at Longwood University on Tuesday, October 4 in Farmville, Virginia.
Joe Raedle/Getty Images
Republican vice presidential nominee Mike Pence speaks as Democratic vice presidential nominee Tim Kaine and debate moderator Elaine Quijano listen during the Vice Presidential Debate at Longwood University on Tuesday, October 4 in Farmville, Virginia.
Now playing
02:01
The highs and lows of the vice presidential debate
Kaine Pence debate split 01
CNN
Kaine Pence debate split 01
Now playing
00:39
Pence: You whipped out that Mexican thing again
Mike Pence and Tim Kaine arrive for the vice presidential debate at Longwood University in Farmville, Virginia, on October 4, 2016.
JEWEL SAMAD/AFP/Getty
Mike Pence and Tim Kaine arrive for the vice presidential debate at Longwood University in Farmville, Virginia, on October 4, 2016.
Now playing
01:45
Pence: We'd never punish women for getting an abortion
Patrick Semansky/Julio Cortez/AP
Now playing
01:02
A full minute of Kaine and Pence talking over each other
Democratic vice presidential candidate Tim Kaine (L) and Republican vice presidential candidate Mike Pence (R) speak during the US vice presidential debate at Longwood University in Farmville, Virginia on October 4, 2016.


 / AFP / SAUL LOEB        (Photo credit should read SAUL LOEB/AFP/Getty Images)
SAUL LOEB/AFP/Getty Images
Democratic vice presidential candidate Tim Kaine (L) and Republican vice presidential candidate Mike Pence (R) speak during the US vice presidential debate at Longwood University in Farmville, Virginia on October 4, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Now playing
01:37
Mike Pence: Putin a 'small and bullying leader'
Now playing
00:55
Kaine on 'deplorables:' Clinton apologized
Chip Somodevilla/Win McNamee/Getty Images
Now playing
01:07
Pence: 'Did you work on that one a long time?'
Democratic vice presidential candidate Tim Kaine (L) and Republican vice presidential candidate Mike Pence (R) speak during the US vice presidential debate at Longwood University in Farmville, Virginia on October 4, 2016.


 / AFP / SAUL LOEB        (Photo credit should read SAUL LOEB/AFP/Getty Images)
SAUL LOEB/AFP/Getty Images
Democratic vice presidential candidate Tim Kaine (L) and Republican vice presidential candidate Mike Pence (R) speak during the US vice presidential debate at Longwood University in Farmville, Virginia on October 4, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Now playing
00:50
Tim Kaine: Donald Trump needs to meet 'Nixon standard'
FARMVILLE, VA - OCTOBER 04:  Republican vice presidential nominee Mike Pence (L) speaks as Democratic vice presidential nominee Tim Kaine (R) and debate moderator Elaine Quijano (C) listen during the Vice Presidential Debate at Longwood University on October 4, 2016 in Farmville, Virginia.  This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates.  (Photo by Joe Raedle/Getty Images)
Joe Raedle/Getty Images
FARMVILLE, VA - OCTOBER 04: Republican vice presidential nominee Mike Pence (L) speaks as Democratic vice presidential nominee Tim Kaine (R) and debate moderator Elaine Quijano (C) listen during the Vice Presidential Debate at Longwood University on October 4, 2016 in Farmville, Virginia. This is the second of four debates during the presidential election season and the only debate between the vice presidential candidates. (Photo by Joe Raedle/Getty Images)
Now playing
01:07
Pence: Trump used tax code the way it should be used
Now playing
00:49
Tim Kaine: Donald Trump always puts himself first
Now playing
00:53
Mike Pence calls Longwood University 'Norwood'
Now playing
01:15
Pence to Kaine: You would know about campaign insults