In the event of a tie in the 2012 Presidential Election...

...the House of Representatives votes, state by state, for the President. This means that if Great Plains were a state with 1 congressperson (Democrat), that person would presumably back the Democrat. If Metropolis were a state with 31 representatives (16 Republicans and 15 Democrats) then assuming party lines hold, that's one vote for the Republicans.

Here's a chart showing how this looked before the 2010 elections:

With a few results pending, the picture has changed:

The upshot of this is that if the Electoral College result (remembering that the distribution by states will change by 2012) produces a dead heat (269-269 for example) then right now it would mean a Republican President and a Democrat Vice President (the Senate gets to vote for the Vice President in this scenario).

2010 Governors' Election Results So Far

At the time of writing, CBS News reckons there are 28 Republican Governors, 15 Democrats, 1 Independent and six results to come. However, Brian Dubie the Republican candidate in Vermont, has reportedly conceded, so I make it:

Republicans 28
Republicans lead in 3 (Connecticut, Maine, Oregon)
Democrats 16
Democrats lead in 2 (Illinois, Minnesota)
Independent 1

N.B. Although the five remaining contests are coloured according to the current lead, I would be surprised if none of these changed, for example Connecticut and/or Illinois, which are virtual dead heats.