Final answer:
The statement "Warren G. Harding, a popular Republican senator from Ohio, campaigned for president on a 'Return to Normalcy' platform" is an opinion.
Step-by-step explanation:
The statement "Warren G. Harding, a popular Republican senator from Ohio, campaigned for president on a 'Return to Normalcy' platform" is an opinion. An opinion expresses a personal belief or judgment, which can vary from person to person. In this case, whether or not Harding was popular and campaigned on a 'Return to Normalcy' platform is subjective and open to interpretation.
Learn more about Identifying opinions and facts in statements