Some numbers

Total electoral college votes of states where Obama won the primary or caucus:
197. Of this total, the number of electoral college votes in states he will have difficulty or find it impossible to defeat McCain in a general election: 125

Total electoral college votes of states where Clinton won the primary or caucus:
284.
Of this total, the number of electoral college votes in states she will have difficulty or find it impossible to defeat McCain in a general election: 62

Number of states Obama has won: 26. Combined population of those states: 98,585,000
Of these states- the number that have gone Republican in the last two general elections: 15

Number of states Clinton has won: 17. Combined population of those states: 148,460,000
Of these states - the number that have gone Republican in the last two general elections: 4