Challenge: Get Vermont to vote Republican again

[Clark Kent]

Vermont used to be one of the most Republican states in the country. From 1856 to 1960, it voted Republican in every single presidential election, the longest streak in American history. It voted Democratic for the first time when it went for Lyndon Johnson in 1964, and then voted Republican again from 1968-1988. Only since 1992 has it been one of the most Democratic states in the country. Your challenge is to make Vermont vote Republican again in the near future without significantly changing either Vermont or the national party. Both can still change, but it has to be plausible, so no "nuclear fallout kills all Vermont Democrats" or "Republican Party shifts to the left of the Democrats and becomes ultra-socialist".

[Clark Kent]

What's next? "Get Alabama to vote Democratic again"?

Why not? Though I'd go for Arkansas, since it has a longer Democratic streak (1876 to 1964 or 1968 if you count the AIP as Democratic).