Time, and the future achievements and/or failures, will define Trump's presidency. At this point, it appears he is on track for a successful term but has plenty of Democrats and Republicans out to wreck that if possible.
I don't see Trump as a politician and maybe that's a good thing. For too long we have needed someone to run the country like a business and I believe Trump is attempting to do just that. The problem with that is that Trump is not used to the roadblocks that politics throws in his way. Some of those roadblocks are necessary and needed but others are frustrating Trump, I believe making his job more difficult. I do though believe Trump has faced unprecedented opposition that no other President has ever had to face or endure and that means opposition coming from the media, opposition party and his own party members. In the face of this opposition, continues to do that which is stated as being impossible or improbable such as establish talks with North Korea. If those talks are successful I would not rule out a dialog with Iran although it's a totally different situation than North Korea.