The phrase "professional politicians" refers to individuals who make a career out of politics and hold elected positions or work in political roles. Full definition
This change has produced some good side - effects - the present generation of professional politicians works harder for their constituents than the previous one of citizen legislators did. (conservativehome.blogs.com)
For better or worse, we pick professional politicians in pretty much the same way we pick friends from elementary school on — whether we think we «click» with them or not. (epolitics.com)
MPs are increasingly seen as professional politicians - viewed as doing a job. (conservativehome.blogs.com)