Final answer:
During the 2008 presidential election, John McCain's campaign highlighted his experience and background, including his opposition to torture and his service as a Vietnam veteran. His reputation as a maverick and his willingness to break ranks with his party appealed to Republican voters and moderates.
Step-by-step explanation:
During the 2008 presidential election, John McCain's campaign highlighted his experience and background to appeal to core Republican voters and moderates. McCain's reputation as a maverick who broke ranks with his party and his service to the nation as a Vietnam veteran resonated with voters. His campaign also emphasized his stance against torture and his opposition to nationalistic posturing.