I don’t know. I assume either some bad personal issue (either health or personal/family scandal) or the Republican Party has wisely arranged to escort her offstage by arranging a cushy job for her where she can’t cause trouble by dangling herself as a possible POTUS candidate. I hope it’s the latter. Though I think she was and would be a disaster in any Presidential campaign, it’s really not her fault that she was stuck into a position she was utterly unqualified to handle, and they owe her a comfy job for their big mistake.
On the 4th?
There are bad actors behind this
The ONLY thing that makes sense at the moment is that she is removing herself to take targets away from Obama, thereby focusing matters on Obama.
Thats a real long shot IMHO
If she is tired now, she wasnt ready for the VP or presidency