The phrase "again declared that" is correct and usable in written English.
It can be used when someone is reiterating a statement or position they have previously expressed.
Example: "The president again declared that the new policy would benefit the economy."
Alternatives: "reiterated that" or "stated once more that".
Today the Saudi foreign minister, Prince Saud al-Faisal, again declared that his kingdom did not want American forces to use Saudi soil for any military campaign against Iraq.
He again declared that the China-driven mining boom was "at an end", with big consequences for Australia, and that it was not an economic situation in which any government could bring the budget immediately back to surplus.
In last week's debate Mr. Bush again declared that he plans to spend a quarter of the surplus on popular new programs, even though his own budget shows that he plans to spend less than half that much.
During the half-hour appearance before reporters in Scottsdale, Ariz., a defiant Mr. Cain once again declared that Ms. Kraushaar's accusations were found to have been "baseless" and repeated his claim that his only offense against her was to have made an innocent gesture about her height.
Almost all Republicans saw that as a tax increase, and a big one, but Mr. Norquist — seeing that passage was inevitable — again declared that the deal did not violate his group's no-new-taxes pledge since letting all the tax cuts expire would be worse.
On Thursday Scott Morrison stood in front of what seems to be the new logo for "Border Force" – an ominous blank face in a helmet looking like a cross between Darth Vader and Daft Punk – and once again declared that Operation Sovereign Borders had been a raging success and that the government would not "budge" or "roll over" or "be intimidated".
You may also recall a scene in which Robert Hughes (him again) declares that Crumb is our era's Hogarth.
Now, The Chronicle's editors and publisher are once again declaring that the newspaper is on its way to excellence.
And as we meet here, we again declare that the regime of Bashar al-Assad must come to an end so that the suffering of the Syrian people can stop and a new dawn can begin.
On Thursday, Gatwick announced its busiest ever September, with 4 million passengers travelling through the airport, prompting its chief executive Stewart Wingate to again declare that a second runway in West Sussex would be "delivered faster, with a fraction of the environmental impact".
And here he is again, declaring that he's two thinks from declaring candidacy and riding to America's rescue.
