Munroe was elected in a landslide.
Evidence
Monroe was elected. Monroe elected.
His fundamental shift fundamental being → in electorate AND Monroe → shift elected well-run campaign elected + well-run campaign
Conclusion
One can't avoid the conclusion that fundamental shift. there's been a fundamental shift in the sentiments of the electorate.
Evaluate
This is a valid argument since they give us a conditional (signified by the certainty of ). In other words, X requires Y and Z.
X → Y and Z
They tell us that the trigger happened (Munroe was elected).
X.
From that, we already know that both Y and Z necessarily follow. Their conclusion for some reason only chooses to mention one of those things (still valid).
Y.
Goal
So we know to replicate this we need two premises: 1. conditional premise (probably with AND in outcome) 2. factual premise that triggers the conditional premise
The conclusion 3. the outcome of the conditional (or part of it)
It's not necessary for the correct answer to replicate the fact that the conditional had a "Y and Z" outcome, but it probably will, so I would use that as a filtering mechanism on a first pass.
But the essence of the argument is just premise: here's a rule premise: here's a fact that triggers the rule. conclusion: here's (part of) the outcome of rule.