 
 <translate> The important part for answering this question is: Twelve United States presidents have made presidential visits to the United Kingdom and Ireland. Therefore, the final answer is Twelve United States presidents. <ibo> Ihe dị mkpa iji zaa ajụjụ a bụ: Ndị isi ala iri na abụọ nke United States emeela nleta ndị isi ala na United Kingdom na Ireland. N'ihi ya, azịza ikpeazụ bụ ndị isi ala iri na abụọ nke United States. 