Jam'iyyar PDP da ta kwashe shekaru kimanin 15 tana jan ragamar mulki a kasar ta tabbatar da shugaban kasa Goodluck Jonathan a matsayin wanda zai tsaya mata takara a zaben na watzan Fabrairun 2015, yayin da tsohon shugaban gwamnatin mulkin sojin Najeriya Janar Muhammad Buhari mai ritaya ya samu tikitin tsaya wa jam'iyyar adawa ta APC takara.