OK, all this talk of politics somehow rekindled a memory of an NPR story a long time ago about a comment Bill Clinton made at a press conference. He made a comment using the phrase

"Adam's Off Ox"

In a sentence: " I don't know him from Adam's Off Ox"

So the NPR commentary traced the idiomatic phrase to rural Arkansas although the roots were ultimately traced to 18th century England.

So, what are the idiomatic phrases in your region?