The 269-269 EV Thread

[minionofmidas]

They could, but defect, but I've never heard of an elector switching his vote to the other candidate.

http://www.electionreform.org/ERMain/priorities/ec/data/faithless.htm

there is a list of electors who changed their vote

None of whom crossed party lines between the Democrats and the Republicans though.

This one I found interesting:

1820 - William Plummer, Sr. (D/R-NH)

In this well-known act of 'patriotism', Plummer apparently changed his vote from Democratic-Republican candidate James Monroe to fellow Democratic-Republican John Quincy Adams (who was not a candidate) supposedly after concluding that no President other than George Washington should be elected with the unanimous vote of the Electoral College.

Legend.
He held a speech to his fellow electors declaring that the reason he voted against Monroe/Tompkins was that they were both highly incompetent.

[Reignman]

here's a scenerio that is realistic but not that expected.

[minionofmidas]

I wouldn't call it "realistic" - "possible" is a better word for it.