The phrase "a big constituency" is correct and usable in written English.
It can be used when referring to a large group of people who support or are represented by a particular political figure or organization.
Example: "The senator has a big constituency that values environmental protection and sustainable development."
Alternatives: "a large voter base" or "a significant following".
It's not like there's a big constituency for him on Long Island".
Small businesses, which employ about 40percentt of the private labor force, are a big constituency for both parties.
"Corby – Corby and east Northamptonshire – is a big constituency with lots of different parts to it," said Miliband.
"It's a big constituency, and now they get what they were looking for — voters!" The government is not shy about acknowledging the potential gains at the polls.
In Warsaw and Gdansk, he will make a play for Catholic and Polish voters (a big constituency in Pennsylvania and Michigan), Republican political strategists say.
"Doing this," she said, referring to his embrace of gay rights, "especially as an African-American Christian, he took a bold stand and risked losing a big constituency".
Overhauling Social Security and Medicare has many purposes: to extend people's working lives; to make them pay more of the costs of their own retirement, as opposed to relying on subsidies from younger Americans; to prevent spending on old-age welfare from crippling other government programs or the economy; to create a bigger constituency for cost control in health care.
She directs custom to other venues, because though her club may be small and perfectly formed, it can't house a kitchen or a lounge; she puts on club nights at other venues, too, because Vanilla attracts a bigger constituency than can be satisfied by a little lesbian nook.
"There's a bigger constituency for supporting the public schools than either of these initiatives is getting," DiCamillo said.
Among the electoral blocs a politician has to worry about, voters stuck in outer space do not make for a very big constituency -- not yet, anyway.
The Workers Partyy came within sight of victory in Aljunied, a big "group" constituency (in which voters select a party slate of five or six candidates), gaining 44%.
