The phrase "asserts through" is correct and usable in written English.
It can be used when indicating that something is being stated or expressed via a particular medium or method.
Example: "The author asserts through her narrative that resilience is key to overcoming adversity."
Alternatives: "claims via" or "states through".
He asserts: "Through him, the hard left is beginning to exert a more suffocating grip on our party".
Richard Ford, the American writer, asserts through the eponymous hero of his novel The Sportswriter that the trouble with professional sportsmen – and women – is that they're incredibly boring people.
A forthcoming piece, by Steve Evans, in The Baffler, a leftist Chicago magazine, asserts, "Through men like Dana Gioia, John Barr, and Ted Kooser, Karl Rove's battle-tested blend of unapologetic economic elitism and reactionary cultural populism is now being marketed in the far-off reaches of the poetry world".
In her article, titled, "In a final videotaped message, a sad reflection of the sexist stories we so often see on screen," Hornaday asserts (through a reading of his final YouTube video) that Elliot Rodger's mass murder spree on May 23 was spurred on not just by some assumed mental illness, but that the killers "delusions were inflated, if not created, by the entertainment industry he grew up in".
Nor can it be asserted through power of office.
Mr. Hicks has asserted through his lawyers that he never committed any violent acts against American or coalition forces.
We then brainstormed ideas and narratives that we believe and want to assert through our work, for example: housing is a human right, market is a human construct that can change, and people are more important than profits.
Mr. Condit originally asserted, through his staff, that there had been no affair, but then Ms. Levy's aunt, Linda Zamsky, said that Chandra Levy and Gary Condit had been dating for months.
What little influence the Americans have is asserted through wary forays in armored vehicles, and by laser-guided bombs that obliterate enemy safe houses identified by scouts who penetrate militant ranks.
1096 (28 U.S.C.A. § 41(26), may be availed of for the litigation and final disposition of the rival claims of two states, each asserting through its officers the right to recover death taxes on the ground that decedent was last domiciled within its boundaries.
"It's very difficult to enhance customer experience," Adachi asserted through an interpreter.
