Final answer:
A topic sentence supporting either Polk or Clay for the presidency.
Step-by-step explanation:
A topic sentence for an editorial supporting either Polk or Clay for the presidency could be:
James K. Polk's vision for territorial expansion and commitment to annexing Texas and acquiring parts of Oregon make him the ideal candidate for the presidency.
This topic sentence highlights Polk's vocal expansionist stance and his promise to pursue territorial expansion, which were key issues in the election.
By stating that Polk's vision and commitment make him the ideal candidate, the sentence supports a positive editorial in favor of Polk.