Which of these three states that last went Democratic in 2012...

[Plankton5165]

Iowa, Ohio, and Florida all went to Obama twice.

But, at the time, they actually all had longer bellwether streaks than the current states tied for the longest (PA, MI, and WI).

These are the states Obama carried twice, that Trump carried twice.

Which of them will also go Republican in all of the following elections: 2024, 2028, 2032, 2036, and possibly 2040?

I'm pretty sure Iowa and Ohio. I think Florida will also go GOP in 2024 and 2028, but not too sure about after that. Republicans may make similar inroads as they did in Texas in the 1980s and the 1990s which continued to vote to the right in spite of Dole not being from Texas, making Florida the new Texas. So, I voted all three of them in the poll. Florida might not, but I voted that as well as Ohiowa.

[the artist formerly known as catmusic]

I think Florida. The right candidate has a chance in Ohio/Iowa (and I hope we get a candidate like that) but given the rightward trend of the Hispanic population and Florida's...well, being Florida, I think the GOP has a great shot at holding it for a long time. But I wouldn't be surprised if all 3 of these states are out of the D's hands for the next several cycles.

[Agonized-Statism]

Iowa is the only one I'm sure on. The Plains have been the Republicans' only consistent base going back to the 19th century and I see no reason for that to change in the next 20 years; the few times it flipped were historical aberrations. Ohio probably won't either. Florida is a coin toss.

[Ferguson97]

Iowa I guess, but 18 years is a long time.