The phrase "a mainstream member" is correct and usable in written English.
It can be used to describe someone who is part of a widely accepted or popular group or movement.
Example: "As a mainstream member of the community, she often participates in events that attract large audiences."
Alternatives: "a conventional member" or "a popular member".
D. Michael Quinn, author of a two-volume work on the Mormon hierarchy, said that while mainstream members are sensitive to gibes about placing their faith in a gerontocracy, their excitement with Hinckley's strong advent has a softer center.
The result is that what had been a wispy tale of purportedly buried documents and cover-ups designed to hide the president's supposed birth in Kenya — a tale that has been dismissed by most mainstream members of both political parties — now appears to have staying power as the political season lurches toward 2012.
The new leadership is avowedly Catholic: most senior figures have crucifixes in their office and appear frequently on Radio Maryja, an ultra-Catholic station much disliked by more mainstream members of the church hierarchy, not least for its anti-Semitism.The man everybody likes to hate most is the leader of the Law and Justice party, Jaroslaw Kaczynski.
But more mainstream members of the anti-abortion rights movement regard heartbeat laws as a waste of time, because they are so patently unconstitutional.
The most egregious forms of discrimination were essentially dealt with in the sweeping legislation of the 1960's and 70's, supported by mainstream members of both parties.
The veteran member of Parliament, Gerald Kaufman, usually a Blair loyalist, has said that "there is substantial resistance in the parliamentary Labor Party against war on Iraq, not just from the usual suspects" -- not just the ornery anti-American left, that is, but from many mainstream members of Parliament who supported America's war on terrorism after Sept. 11.
The feud between the Overtown occupiers and more mainstream members has only gotten worse.
Unlike a lot of things Trump does, his porn pledge was not some rogue stance that many mainstream members of his party opposed.
For generations, public HBCUs have quietly fought with state leadership nationwide to be seen and supported as mainstream members of the state higher ed community.
He stands here and tells us that he's a moderate, mainstream, independent member of Congress.
