During the campaign, the candidate kept emphasizing the need for reform, creating a strong drumbeat for change.

drumbeat 由 drum（鼓）和 beat（敲打）组成，字面意思是"鼓声"。在比喻用法中，drumbeat 表示"持续有力的推动或宣传"，就像鼓声一样有节奏且持续不断。这里形容候选人持续强调改革，营造出推动变革的强烈氛围。