UNH is a notoriously terrible pollster, plus it should be pointed out that Sununu’s average approval score is 5.0, barely higher than Benson’s at this point (4.6), and the latter lost reelection in a Republican year (which 2018 obviously will not be). 63% approval among “Independents” and 38% among Democrats? Doubtful. Also notice the trend here... it was 71% and 47% in February, respectively, so he has actually lost some ground, at least as far as his approval ratings among those groups are concerned.
Btw: Party ID numbers have Republicans at 35%, but it was only 28% in 2016?
You're literally trying to unskew the polls just because they don't fit your narrative.