Last year he was named an activist applying for Party membership.
Tips
culture
In the Communist Party an 入党积极分子 is an official stage: after applying, a person is named an activist and watched for at least a year before they can become a probationary member, a 预备党员.
usage
分子 is fènzǐ here, "member", as in 知识分子 "intellectual"; fēnzǐ is "molecule".