When did Democrats lose the Obama-Trump voters?
What in tarnation do you mean?
...the Eisenhower-Obama overlay, and it is remarkable:
When all is said and done, I think that the Obama and Eisenhower Presidencies are going to look like good analogues. Both Presidents are chilly rationalists. Both are practically scandal-free administrations. Both started with a troublesome war that both found their way out of. Neither did much to 'grow' the strength of their Parties in either House of Congress. To compare ISIS to Fidel Castro is completely unfair to Fidel Castro, a gentleman by contrast to ISIS.
The definitive moderate Republican may have been Dwight Eisenhower, and I have heard plenty of Democrats praise the Eisenhower Presidency. He went along with Supreme Court rulings that outlawed segregationist practices, stayed clear of the McCarthy bandwagon, and let McCarthy implode.
gray -- did not vote in 1952 or 1956
white -- Eisenhower twice, Obama twice
deep blue -- Republican all four elections
light blue -- Republican all but 2012 (I assume that greater Omaha went for Ike twice)
light green -- Eisenhower once, Stevenson once, Obama never
dark green -- Stevenson twice, Obama never
pink -- Stevenson twice, Obama once
No state voted Democratic all four times, so no state is in deep red.
You can ignore the counts of electoral votes which apply to 2008.
The problem for Republicans:
This map is not as neat as that of the original Eisenhower-Obama overlay.
Electoral votes can be ignored, as those are for 2008.
gray -- did not vote in 1952 or 1956
white -- Eisenhower twice, Obama twice, Biden 2020
red -- Eisenhower twice, Obama twice, Trump 2020
pink -- Stevenson twice, Obama once, Trump 2020
light orange -- Eisenhower twice, Obama never, Biden 2020
orange -- Stevenson twice, Obama never, Biden 2020
deep blue -- Republican all five elections
light blue -- Republican all but 2012 (I assume that greater Omaha went for Ike twice)
light green -- Eisenhower once, Stevenson once, Obama never
dark green -- Stevenson twice, Obama never, Trump 2020
pink -- Stevenson twice, Obama once, Trump 2020
No state voted Democratic all four times, so no state is in deep red.