If you describe someone involved in politics as an agitator, you disapprove of them because of the trouble they cause in organizing campaigns and protests.
例句
...a famous actress who was accused of being a political agitator.被指控为政治煽动者的著名女演员
英汉词典释义
n.
<贬>(尤指政治变革的)鼓动者,煽动者
Mona had watched him grow into an arrogant political agitator.莫娜瞧着他成长为一个高傲的政治鼓动家。