That is Barack Obama with his only wife and his only two kids. Note that his entire family is there onstage.
You will not see John McCain with his whole family onstage. You might see his CURRENT family onstage. But you definitely won't see his 41-year-old daughter Sidney, because he abandoned her (along with her mother, John McCain's first wife) back in 1980. She lives in Canada, and he hasn't spoken to her in a decade.