that's a nightmare scenario. a majority congress can pick the prez if there is a 269 tie. the vp slot can also be picked by a sitting vp, so biden can pick himself. imagine a gop dominated congress picks romney, and biden picks himself.
also, it can fall either to electoral votes by virtue of state representation and/or one vote per state. if it is the latter, pubs will win.
That would be funny shit...I can't tell the difference between Romney and Biden. Both look so much identical, with those eyes and teeth.