Across multiple poll providers, his approval -7.2[1] (although this hasn't updated with the latest Rasmussen poll). Rasmussen is the only provider that has him in positive territory.
Interestingly, Fox gives him the second worst result (only ABC/WashPost gives him worse)
[1] http://www.realclearpolitics.com/epolls/other/trump_favorabl...
Trump's approval is 57%
http://www.rasmussenreports.com/public_content/politics/trum...
The notion that it's useful to pretend Trump represents a tiny group of supporters, for personal emotional comfort over facts, isn't going to be useful in actually trying to counter bad policy. Step one is recognizing that Trump has a very large base that put him into the White House. That he only lost the popular vote by 2.8 million (2.x% of all votes) with California and New York included, is astounding and points to just how large his actual base is. Not to mention the fact that Hillary didn't manage to pull a majority of votes, versus eg Obama's 51.1% in 2012, Obama's 53% in 2008, and Bush's 50.7% in 2004.