I think he better comparison to Reagan/Thatcher may wind up being Trump/La Pen, vs Trump/May.
OMG, I would love to see that. Trump and Le Pen in the Rose Garden with arms up!
Another point, you can just see that Trump would 'get on' much better with Le Pen, two fighters with similar views, rather than beta male Macron. Trump and Macron at lunch? Not so much.
The reality of this is also something the French people should think about before May 7. Not sure what the ways are and how we help France, but it would serve the French people's interest to vote for Le Pen, as far as Trump and the USA are concerned.