Want a real Constitutional mess that's happened in the last ten years?
Remember this "oaf of office"?
http://www.telegraph.co.uk/news/wor...akes-oath-after-mistakes-at-inauguration.html
So Obama messed that up on first attempt, and before Biden took the VP oath, Bush and Cheney were relieved of office Constitutionally at noon Jan 20, and the 20th Amendment, Article II, provides when a President and VP fail to qualify (and that means take the official oath) the succession act sequence triggers. So, following that ...
If the Speaker (Pelosi) would've resigned, she'd have become President. That didn't happen.
So then if the Pres Pro Tempore of the Senate (Byrd) would've resign he'd have become President. Didn't happen either.
So there was a brief window, just after noon on Jan 20, 2009 where there's this void: Bush and Cheney are done per the Constitution; Obama messed up the oath; Biden hasn't taken it; Pelosi and Byrd didn't resign their positions in Congress.
Who's next in succession? SecState.
Well,
meet the first black, the first woman, President of the United States: Condoleezza Rice.
She was succeeded by Biden who did execute his VP oath successfully before Obama had his do-over* and became President.
*There has to be a teleprompter joke in there somewhere.