Question: Who is the child of Obama's opponent in his first election?

Knowledge 1: Barack Obama
Obama was born in Honolulu, Hawaii. After graduating from Columbia University in 1983, he worked as a community organizer in Chicago. In 1988, he enrolled in Harvard Law School, where he was the first black president of the Harvard Law Review. After graduating, he became a civil rights attorney and an academic, teaching constitutional law at the University of Chicago Law School from 1992 to 2004. He represented the 13th district for three terms in the Illinois Senate from 1997 until 2004 when he ran for the U.S. Senate. He received national attention in 2004 with his March primary win, his well-received July Democratic National Convention keynote address, and his landslide November election to the Senate. In 2008, he was nominated for president a year after his campaign began and after a close primary campaign against Hillary Clinton. He was elected over Republican John McCain and was inaugurated on January 20, 2009. Nine months later, he was named the 2009 Nobel Peace Prize laureate. [SEP] Knowledge 2: Dirty Sexy Politics
Dirty Sexy Politics is a 2010 political memoir written by Meghan McCain, the daughter of Republican Senator John McCain, about the 2008 United States presidential election.
Knowledge 1: 2008 United States presidential election
The United States presidential election of 2008 was the 56th quadrennial presidential election. It was held on Tuesday, November 4, 2008. The Democratic ticket of Barack Obama, a Senator from Illinois, and Joe Biden, a long - time Senator from Delaware, defeated the Republican ticket of Senator John McCain of Arizona and Governor Sarah Palin of Alaska. Obama became the first African American ever to be elected as president. [SEP] Knowledge 2: Dirty Sexy Politics
Dirty Sexy Politics is a 2010 political memoir written by Meghan McCain, the daughter of Republican Senator John McCain, about the 2008 United States presidential election.
Knowledge 1: Barack Obama
Obama was born in Honolulu, Hawaii. After graduating from Columbia University in 1983, he worked as a community organizer in Chicago. In 1988, he enrolled in Harvard Law School, where he was the first black president of the Harvard Law Review. After graduating, he became a civil rights attorney and an academic, teaching constitutional law at the University of Chicago Law School from 1992 to 2004. He represented the 13th district for three terms in the Illinois Senate from 1997 until 2004 when he ran for the U.S. Senate. He received national attention in 2004 with his March primary win, his well-received July Democratic National Convention keynote address, and his landslide November election to the Senate. In 2008, he was nominated for president a year after his campaign began and after a close primary campaign against Hillary Clinton. He was elected over Republican John McCain and was inaugurated on January 20, 2009. Nine months later, he was named the 2009 Nobel Peace Prize laureate. [SEP] Knowledge 2: 2008 United States presidential election
The United States presidential election of 2008 was the 56th quadrennial presidential election. It was held on Tuesday, November 4, 2008. The Democratic ticket of Barack Obama, a Senator from Illinois, and Joe Biden, a long - time Senator from Delaware, defeated the Republican ticket of Senator John McCain of Arizona and Governor Sarah Palin of Alaska. Obama became the first African American ever to be elected as president.

Answer: Meghan McCain