I think the fact that we have so much polarization in this country is a factor that could lead to us having multiple 1 term President. I would say it's possible that the next two or three presidents after Trump or including Trump could be one term only due to the political climate in the U.S
More likely than multiple consectutive one termers is that each prez has only a two year window with congressional majorities to get legislative stuff done. The House flips in the first midterm, and even if the prez is reelected, the House stays with the opposition party while the senate gets lost in the second midterm. If at all; the senate could remain under GOP control in 2020 even with a Dem prez. HRC would have had a full GOP congress for her entire term.