The link that you posted seems quite out of date, and was published shortly after setting a new record low for job approval in August, Bavius.

This one is much more unto date.

http://www.greensboro.com/news/government/elon-poll-president-trump-s-approval-rating-sags/article_9e75f70f-e9dc-5d29-b28c-7f0dbdf8dd23.html

Trump's job approval rating with Gallup stands at 37% as of 1/10/2017.