I think this thread was around before, but I couldn't find it, the search function being what it is. Anyway, the idea here is to suggest alternate Vice Presidents, such as the title suggests. This isn't meant to be a unified timeline, and the various suggestions and their likely consequences should be discussed individually.
For example, let's start with Gerald Ford. I've heard that Ford considered Bush for the Vice Presidency. What would the result of such an appointment be?
He probably wins Texas and Missouri and the election. Howard Baker was also considered a strong contender.
Nixon's first choice was Connally but the Democrats wouldn't confirm a traitor; he narrowed it down to Ford or Bush.
Lynn Morley Martin was considered to be Bush's VP instead of Quayle. Definitely could have been the first female President.
If Nixon chose Dirksen and/or Kennedy doesn't choose LBJ, Nixon wins.
Similarly, if Gore doesn't pick Leiberman he may pick Bob Graham or Jeane Shaheen, so he wins.
A Reagan/Ford ticket was planning but the deal fell through. And then if Hinckley...
Another still:
What if McCain chose Bachmann instead of Palin for 2008?
No.
No Palin means less Republican turnout in the election, and that ripples down to make Obama's coattails bigger. The Dems start out with around 62 seats in the Senate, which means big butterflies for Obama's legislative success.