The phrase "a powerful case that" is correct and usable in written English.
It can be used when presenting a strong argument or justification for a particular point or claim.
Example: "The research provides a powerful case that climate change is accelerating at an unprecedented rate."
Alternatives: "a compelling argument that" or "a strong justification that".
Mahan made a powerful case that a dominant naval power, through its exercise of command of the sea, can subjugate the rest.
Laura Dawes makes a powerful case that understanding the cultural history of a disease is critical to developing effective health policy.
Organized by Andres Lepik and Margot Weller, the exhibition makes a powerful case that it is possible to create work that is both socially uplifting and architecturally compelling.
Yesterday the United States presented a powerful case that the Syrian government was responsible for this attack on its own people.
She also made a powerful case that the law was harmful to military readiness, the opposite of what its authors said they intended.
"You can make a powerful case that itemized deductions should simply be disallowed completely," said Mr. Kleinbard of the University of Southern California.
And for the first time, there is a potentially powerful case that could make a difference because it is the first challenge to the antimarriage law to reach a federal appeals court, a step away from the Supreme Court.
He makes a powerful case for that argument — and the Who's contribution to the cause — in the pages of this deeply felt but often ungainly book.
Our speaker builds a powerful case for why that is wrong.
There is a powerful case to be made that clean energy investments that will create real jobs and keep America competitive in a $5 trillion global market for advanced energy technologies.
That decision is said to have angered some police officers at Scotland Yard, which believed it had built a powerful case during an investigation that lasted four years.
