Quite the opposite, the author seems quite aware Trump has been denied the benefit of a strong and supportive R party.
Perhaps you missed the the final sentence of the article:
"Executive Orders are now indispensable. Mr. Trump, act!"
I did not miss the reference to "Executive Orders". Unfortunately, history suggests that a significant number of Stupid Party congress-critters would side with the Dishonest Party, and oppose Mr. Trump's orders (possibly to the point of supporting impeachment, as perverse & irrational as that would be). I hope Mr. Trump succeeds, and look forward to supporting him in the next presidential campaign, but won't bet my life savings on either (given the GOPe tendency to seize defeat from the jaws of victory)...