Vance has embraced Trump's MAGA political brand. But during last week's debate, he seemed on a mission to raise his own standing ahead of 2028.

Donald Trump, who has survived two alleged assassination attempts in the past three months, would end his second term as the oldest person ever to serve as President of the United States. Katie Phang explains the reality of what could happen in the event of an emergency where Trump becomes incapacitated or dies and JD Vance could become president of the United States.