C. P.,

His victory does give Trump, the warring factions of a divided GOP and the array of conflicting reactionary elements that elected the Trump/GOP President and Congress an opportunity to devise a coherent program (the clearly don't have one yet), enact this program into law (a daunting challenge), execute the resulting program and hope that this will satisfy the majority of Americans and materially improve domestic and foreign prospects for the US.

Unfortunately for Trump and the GOP, they are far from agreeing on such a program and the electoral base that elected them is shrinking through demographic change.  

Thus, GOP election prospects in two and four years time are at serious risk unless they can show substantial progress on the economic and international fronts.

For these reasons, I suggest that this month's unexpected victory is something of a last stand for the reactionary circles the GOP has chosen to represent.