...his convictions (campaign buttons)...(Para. 8)
conviction: n. very strong opinion or thought held to be true
She will not go against her convictions. 她不会背叛信念。
He has strong convictions about his cause; he will not change his mind. 他对事业有很强的信念,他不会改变自己的想法。
n. 运动,活动,战役,竞选运动
v. 从事运