That's a pretty small universe. Of the most recent 6, only 4 had two terms. Of the most recent 9, still only 4 had two full terms.
> Any reason to thinks Trump or at least the republican party won't too?
Yes.
> Real humans who really wanted him voted him in and they're probably happy with their choice.
Most of the minority that voted for him may, though polling data show that Trump has lost standing with most groups, including those he was strongest with, since the election. With a barely-sufficient minority win, Trump can't lose much ground and hope to be reelected.
You mean the same polls that were 100% sure that he wouldn't win? [1]
"Trump will never make it past the first debate"
"Trump will never win the Republican primary"
"Trump will never win the general election"
(You are here)
(I'm over here)
"Trump will never do jail time."
"Trump will never lead a prison riot that gets a thousand prisoners killed."
"Trump will never cruise the nuclear wastelands of America with his gang of misfits in their hacked together deathmobiles..."
http://www.realclearpolitics.com/epolls/other/president_trum...
http://www.realclearpolitics.com/epolls/other/president_obam...