The phrase "affect constituencies" is correct and usable in written English.
It can be used when discussing the impact or influence on specific groups or communities, often in a political or organizational context.
Example: "The new policy is expected to significantly affect constituencies that rely on public transportation."
Alternatives: "influence communities" or "impact groups".
"My concern is that a divisive list of this kind does nothing to help us take on the Tories and get back into Government or tackle the real issues adversely affecting constituencies like mine".
Mr Field, a former welfare minister who represents Birkenhead in Merseyside, said during a debate in Westminster Hall: "It unfairly affects constituencies in the North West.
Another potential obstacle is that any White House proposal to consolidate or eliminate existing programs traditionally spurs extensive pushback from affected constituencies.
What are our taxpayer dollars funding in this operation if the "Office of Public Engagement" is refusing to engage affected constituencies at all at critical times?
MPs regularly vote on policies which affect other constituencies and not theirs.
Several cabinet ministers including the prime minister are in a predicament because Heathrow expansion could adversely affect their constituencies.
Guardian: You said you'd stop Scottish MPs voting on issues which didn't affect their constituencies - Sir Menzies gave that pretty short shrift, saying he answered to his constituents, not to the party whip.
Initial analysis by Greenpeace indicated the areas covered by the announcement will affect the constituencies of high-profile MPs including former Labour leader Ed Miliband, party leadership candidate Yvette Cooper, the education secretary, Nicky Morgan, and the shadow energy and climate minister Caroline Flint.
In Wisconsin, where Republicans took hold of state government years ago though the populace remained somewhat split politically, the political leaders have done the opposite — pressing forward with a conservative agenda that has included hard-fought measures to reduce labor power, limit abortions and add restrictions on voting that disproportionately affect Democratic constituencies.
