Mexico's next president is the perfect foil to Trump

請問這句話你會如何翻成中文?

墨西哥的下任總統是川普的強烈對比

這個翻譯可能不見得對，因為中文的"強烈對比"意指兩者有相反的特質，但你可以去搜尋這則英文新聞標題並讀其裡面的內容，墨西哥下任總統和川普是有相同特質的人，我不是來踢館，純粹討論

Michael Corleone The word "foil" used in this context means someone that makes another person's qualities more noticeable or enhances their qualities, whatever those qualities may be. I used 強烈對比 but I think you are right; it's not the correct Chinese translation. Since I just told you the meaning of "foil" you can translate the sentence to Chinese by yourself.