Separate Elections for POTUS and VP

[JRP1994]

Suppose that, as is the case when separate elections are held for Governor and Lieutenant Governor, the US adopted a system in which concurrent yet separate and independent elections are held for President and Vice President.

We know how the electoral maps turned out for President. But how would the electoral maps in the last few elections (let's say since 1976) have turned out for VP races?

1976: Dole (R) vs Mondale (D)
1980: Bush (R) vs Mondale (D) vs Lucey (I)
1984: Bush (R) vs Ferraro (D)
1988: Quayle (R) vs Bentsen (D)
1992: Quayle (R) vs Gore (D) vs Stockdale (I)
1996: Kemp (R) vs Gore (D) vs Choate (R)
2000: Cheney (R) vs Lieberman (D)
2004: Cheney (R) vs Edwards (D)
2008: Palin (R) vs Biden (D)
2012: Ryan (R) vs Biden (D)

Let the speculation begin!

[JRP1994]

Are we talking about primaries for President and Vice President, or are we talking about a President picking a VP, and they running separately but together?

President picking VP, and the two running separately but together.