have in corner

have (someone) in (one's) corner

To have someone who supports, defends, or assists one. It's been great having such a high-profile figure in my corner during this trial. Don't worry, you'll always have me in your corner if you ever need help with this.
See also: corner, have

have someone in one's corner

Fig. to have someone supporting one's position or goals. (Originally from boxing.) As long as I have Mr. Howe in my corner, I feel confident about what I have to say.
See also: corner, have