beat the drum for someone/something
beat the drum (for someone or something)
To voice one's support for something. Quit beating the drum for that applicant—he is simply not qualified for the job. At first the legislation didn't seem to have much support, but recently I've seen some people beating the drum online.
beat the drum for someone/something
tv. to promote or support someone or something. I spent a lot of time beating the drum for our plans for the future.