Yes, you are correct.  
Except that all  pollsters on Trump have not yet found a way to tap in or access the Silent Majority that enabled Trump to become the 45th president of the US.
Until they do, Job Approval ratings of Donald J. Trump mean nothing - except for the media and Democrats who need something to console them for having lost in Election2016. (The media was all-in in their anti-Trump campaign in Election2016 but failed miserably in spite of day after day, week after week of vilifying and demonizing Trump - racist, bigot, not fit to be president, etc. etc.)
For to supporters of Trump, his approval rating should be 110% trying to accomplish what he promised them all in Election2016 - no matter that his EO has been blocked nor Healthcare voting withdrawn except that his EO and his Healthcare attempt is in line with his promise to his supporters.