It doesn’t do much good to drain a swamp if it just fills back up again. So, everything Trump and the Republicans do to fix the mess in Washington can be undone by a new administration. The problems are structural, and to fix them for good you need amendments to the Constitution.
That’s where Article V comes in. Trump and the Republican Congress have no role to play in that process. That’s up to both Republican and Democrat state legislators.
Trump and Congrerss just have to get out of the way. That’s exactly what the Framers had in mind when they wrote Article V.