in power
Having some degree of political power, as through election or appointment. I don't know how people could have put such a brutal tyrant in power. Everyone knows the government has been putting puppets in power around the world to further its own interests.
*in power
in control; in charge. (*Typically: be ~; come [into] ~; get [into] ~.) Who is in power now? No one is in power. The provisional government came into power six months ago.