<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.seneta wa chama cha demokrat barack obama ametangaza rasmi nia yake ya kuwania urais wa marekani katika uchaguzi uliopangwa kufanyika hapo mwaka 2008.  <response>: democrat senator barack obama is set to formally announce his intention to run for president in 2008. 