The phrase "a substantial majority and" is correct and usable in written English.
It can be used when discussing a significant portion of a group or population, often in the context of opinions, votes, or decisions.
Example: "In the recent survey, a substantial majority and a significant minority expressed their support for the new policy."
Alternatives: "a significant majority" or "a large majority".
The opposition represents a substantial majority and those in power should not have polled more than 20% of the votes," says Sidya Touré, opposition spokesperson and head of the Union of Republican Forces.
This is a substantial majority and might appear to bolster the view that students are heavily influenced by free-thinking college professors who challenge religious views by encouraging rational skepticism, or even promoting atheism.
And when we make certain realistic sociological assumptions about which groups the future progeny of Hispanic whites, mixed couples and descendants of people now acknowledging two or more races are likely to identify with, there is every reason to believe that the non-Hispanic white population will remain a substantial majority -- and possibly even grow as a portion of the population.
Indeed, this system and in particular the c as10 gene is present in a substantial majority of archaea and is confidently reconstructed as a gene present in Last Archaeal Common Ancestor (LACA) [ 53].
The Democrats still have a remarkable 18 vote majority in the Senate and a substantial majority in the House and they continue to occupy the White House even though its occupant may prefer to be elsewhere, out among "us".
The ANC has a substantial majority in parliament and the vote was effectively a formality.
Elections held in November 1945 returned a substantial majority of communists and their allies.
Professor Bebchuk commented that a "main reason for the responsiveness is that annual elections are supported by a substantial majority of investors," and that these shareholders tend to support destaggering proposals.
Gay marriage has been embraced by a substantial majority of Democrats and Democratic politicians.
Walpole commanded a substantial majority in Parliament and George had little choice but to retain him or risk ministerial instability.
A substantial majority of chiropractors and osteopaths work exclusively in the private sector.
