The impeachment of Bill Clinton, certainly. Perhaps it was the Hastert rule, post Gingrich because the Republicans in the house thought Newt was too soft on Bill Clinton and the Democrats. They fired him.
It's high past time that we start electing Americans to congress and the presidency who put America first instead of their political party. For way too long we have been electing Republicans and Democrats who happen to be Americans instead of Americans who happen to be Republicans and Democrats.