1
general::
Phrase(s): take charge (of someone or something)
to take (over) control of someone or something. • The president came in late and took charge of the meeting. • When the new manager took charge, things really began to happen.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Assume control, command, or responsibility, as in I'll take charge of selling the tickets if you'll do the publicity, or They're not happy about the counselor who took charge of the children. [Late 1300s]
American Heritage Idioms