run interference

US /rʌn ˌɪntərˈfɪrəns/
UK /rʌn ˌɪntərˈfɪrəns/
"run interference" picture
1.

to help someone by dealing with problems or obstacles for them, often by distracting or blocking others

:
I'll run interference for you while you prepare your presentation.
The manager asked his assistant to run interference with the difficult client.