The phrase "a declaration of support for a" is correct and usable in written English.
It can be used when expressing formal endorsement or backing for a specific cause, person, or initiative.
Example: "The organization issued a declaration of support for a new environmental policy aimed at reducing carbon emissions."
Alternatives: "a statement of backing for a" or "an endorsement of a".
More than 200 leading figures from the arts and academia, including writers, film-makers, actors, comics and broadcasters, have signed a declaration of support for a system of press regulation underpinned by royal charter.
When Trump issued his executive order on immigration, Expedia joined other technology companies in a declaration of support for a lawsuit that the State of Washington had filed against the ban.
"A declaration of support for religion is not the same as declaring National Dairy Week," said Barry Lynn, executive director of Americans United for Separation of Church and State.
Informing the politician that it contains a declaration of support for him, he launches into a diatribe about immigration.
Among the messages posted by Guardiola's account was "Hala Madrid", apparently a declaration of support for Barça's arch rivals Real Madrid.
He received a public endorsement on May 28 when 120 members of Iran's Parliament signed a declaration of support for his candidacy.
Our legal team has prepared a declaration of support for the Washington State Attorney General who will be filing suit against the order.
Following her unexpected declaration of support for a high-speed rail line to Heathrow, Villiers called in two former executives, John Prideaux and Chris Stokes, for advice.
Paris prompted the seven companies that are among the world's biggest users of cotton to put out a joint declaration of support for a climate deal.
With internal cracks and dissension widening, Prime Minister Romano Prodi called for a declaration of support among the diverse partners in his fragile center-left government.
The "yes" campaign for independence wants one million Scots to sign a declaration of support by the time of the referendum in the autumn of 2014.
