Kammala wannan jumla: An gudanar da zaben shugaban kasa na 2008 na Maryland a ranar 12 ga Fabrairu, 2008. An yi wa lakabi da "Potomac Primary" ko "Chesapeake Primary" saboda Gundumar Columbia da Virginia sun gudanar da zaben su a wannan rana (kuma duka uku suna iyaka da Kogin Potomac), jimillar wakilai 70 sun kasance a cikin Maryland. Wanda ya yi nasara a kowane yanki na majalisa takwas na Maryland an ba shi dukkan wakilai na wannan yanki, jimillar 46. An ba da wasu wakilai 24 ga wanda ya lashe jihar, Barack Obama. Wakilan 70 sun wakilci Maryland a
Taron kasa na jam'iyyar Democrat a Denver, Colorado. Wasu wakilai 29 da ba su yi rantsuwa ba, da aka sani da superdelegates, su ma sun halarci taron kuma sun jefa ƙuri'unsu.