From Longman Dictionary of Contemporary Englishdeclare for somebody/something phrasal verbSUPPORT A PERSON, GROUP, OR PLANto state publicly that you support someone or something → declare→ See Verb table
Examples from the Corpus
declare for • On March 6 pay bonuses were announced for all soldiers and an amnesty was declared for deserters and draft dodgers.• In fact he declared for Frederick.• A period of nationwide mourning was declared for Jan. 23-28.• Already, in the regna assigned to Charles at Orléans, a number of important men had declared for Lothar.• Without declaring for or against the coup, Sukarno issued an ordinance stating he had taken over command of the armed forces.• What then had happened between 5 January and 1 March 1201 and why had Innocent declared for Otto before the council?• South Carolina led the way, declaring for secession on December 20, i86o. 