...his convictions (campaign buttons)...(Para. 8)
conviction: n. very strong opinion or thought held to be true
She will not go against her convictions. 她不會背叛信念。
He has strong convictions about his cause; he will not change his mind. 他對事業有很強的信念,他不會改變自己的想法。
n. 運動,活動,戰役,競選運動
v. 從事運