Dubya as a Liberal President
I thought he's already doing that. He supports the wrong part of the Left (expanded entitlements), the right part of the Left (more open borders), and the temporarily-necessary part of the Left (nation building).
How can G.W. Bush...
...become the most entertaining person on the face of the planet?
It's simple. He can wake up one morning and start championing every cause the far-left holds dear.
That might account for the escalating nature of Leftist rhetoric. For example, the usual stereotype of Republicans (that they're racist) no longer holds water when a Republican President supports relaxing immigration restrictions. (A conservative who supports open borders is like a liberal who's pro-nuclear: The stereotypes don't work.) They have to invent issues like gay marriage or pretend that opposition to “self determination” is a matter of racism.