"Establishment support" refers to the backing or endorsement given to a person, idea, or organization by those who are considered influential or authoritative figures in a respected institution or system. Full definition
One predicts the party membership will eventually come around, while the another suggests his candidate can win without establishment support. (news.wbfo.org)
It was good when the Republican establishment supported him. (nystateofpolitics.com)
Kirkpatrick's campaign, which has earned establishment support from groups such as EMILY's List and the Democratic Senatorial Campaign Committee, ended the year with less than $ 1 million in the bank. (rollcall.com)