Here’s a thing
http://www.people-press.org/2017/02/16/1-early-public-attitudes-about-donald-trump/Something is wrong with the percentage under Trunp. When you add up the % that approve (39), to the % that disapprove (56), to the number that don’t know (6), you get 101%. That does not make sense.
Presumably some rounding is happening.