It will be kind of like 1929.
Also if he wins, the Democrats would likely reform under populist causes.
I wouldn't guarantee these things will happen. Well, I know the economy will collapse, but other than that, I can't guarantee those things. But it is entirely conceivable. Much weirder things have happened in recent years, like the Clinton impeachment and the 2000 election fiasco.
Well this wasn't totally inaccurate even if Bush didn't resign...
Except that it was the Republicans who reformed under populist causes. After a fashion.