Not much. Reagan was far more popular than Bush. Bush's percentage of the vote and Reagan's average approval rating were almost exactly the same, in fact.
And if Palin is the next Quayle, that's not exactly good news for the GOP (though VPs don't really matter of course).
I try to take an historical view of elections; I have been following them seriously since 1980, and semi-seriously since 1976. I have b]never[/b] seen anything like the last two weeks. I disagree with Nym, VP's do matter.
First, we saw the "safe" Biden pick, and Obama's poll numbers dropped slightly. That has never happened. Even if to provide a sense of security, the numbers go up, at least slightly. That was first surprise.
Second, was the outbreak of what can only be described as "Palamania." Obama delivered a great speech in 2004, but he never took the country by storm the way Palin has. In less than two weeks, she has become almost iconic. The GOP has become the M Party, McCain, Mavericks, and Motherhood, overnight.
Other VP candidates have risen from relative obscurity. Quayle (1988), Agnew (1968, and more meteoric), Miller (1964, who actually did and American Express, "Do you know me," commercial), even Truman (1944).
None have so electrified the county as Sarah Palin.
The closest
potential analogies were 1988 and 1980, except this didn't happen after one grand shootout of a debate, but after the country looked at the two tickets side by side. It may not hold, and it is too early to tell, but in terms of turnaround by a convention, but 1988 may be the correct analogy.
From even a more historical analogies, the 1944 choice of Truman might work, though he certainly didn't have the same political impact.
The period of time between August 22, 2008 and September 5, 2008 was
absolutely historic in the political history of the United States. It may have a name eventually. The only thing I can say is:
WOW!
What a fortnight!