Build up and Pull strings

Build up verb - To become greater in extent, volume, amount, or number.

Pull strings and build up are semantically related In some cases you can use "Pull strings" instead a verb "Build up".

Pull strings verb - Influence or control shrewdly or deviously.

Build up and pull strings are semantically related in press for political action topic. Sometimes you can use "Build up" instead a verb phrase "Pull strings".