[bk1000]

If a time traveler did something in the past that dramatically altered the present as we know it, only the time traveler would be aware that anything was different. For all we know this may have already happened. Witness the unlikely defeat of Hillary Clinton.

[dfwgator]

If a time traveler did something in the past that dramatically altered the present as we know it, only the time traveler would be aware that anything was different. For all we know this may have already happened. Witness the unlikely defeat of Hillary Clinton.

Maybe Hillary could have disappeared like in "Back To The Future".