Neither of the front-runners in the presidential election is a mainstream politician.总统选举中的两位领先者都不是主流政治家。Many people feel that their interests are not represented by mainstream politics.许多人觉得他们的利益没有在主流政治中得到体现。He has always remained on the fringes of mainstream politics.他一直处在主流政治的边缘。