Arizona Senator John McCain has won the delegates necessary to be the Republican presidential nominee. Now, he needs to focus on the general election and pick a running mate.

The 71-year-old maverick is seen as strong on foreign policy and defense, and thus will likely eye younger candidates who come with solid conservative and economic records.

McCain (right), with Florida Senator Mel Martinez, is already mulling this important choice. Scroll through the gallery to learn more about some of the potential vice presidential candidates, and vote for who you think will get the nod.