I don't understand "a republican through and through" as being a republican has evolved to and fro over the years. The GOP in 1956 was more like today's democrats. The Southern democrats in the 60's, were more like today's republicans.
Really?
Funny, I don't seem to remember seeing Republicans in my lifetime marching in opposition to integration, nor seeing them turning fire hoses and police dogs on peaceful demonstrators.
What you are 100% failing to realize is that the Republicans have not changed, it is the Democrats.
Prior to the 1960's, the Democratic Party was mostly the most Conservative of the 2 parties. But in the counterculture movement came a fundamental shift to the party. First was the unrest that came with the 1968 Democratic Convention, where Anarchists and others fought to take over the party and transform it. And at the same time, the younger generation that was opposed to Jim Crowe was finally coming into it's own. And the South was so firmly locked into the "good old boy" network that nobody who was not in agreement with their policies could hope to get the Democratic Nomination in the region.
And ever since before the Civil War, the Democratic party was a kind of 2 headed beast. You had the more Liberal Northern members, like the Roosevelt clan, and the Kennedy Clan. Then you had the hidebound Conservative Southern Members. Remember, this party has split multiple times since it was founded, including such movements as Dixiecrats and Blue Dog as well as the "Conservative Democrats" that come and go over the years.
But as the Pre-Depression era of Democrats were aging and retiring, the younger and more Liberal ones shifted parties to the Republicans. Primarily over the issue of race, as well as to break the century old power hold the Democrats had in the region.
I am always amused when people talk about the Republicans changing, when it was in reality the Democrats. The Republicans were always a moderate-liberal Party, but after the Democrats shifted they went from far-right to far-left. For an example of this, simply look at the man that none other than Noam Chomsky called the "last Liberal President", and who even President Obama stated was far more Liberal than he was.
He was one of the first to call for a National Health Care system, passed laws to promote treatment instead of incarceration for drug users, opened trade and diplomatic relations with a major Communist country, dumped relations with a Nationalist nation, enacted wage and price freezes, increased Food Stamp funding more than fivefold, and created the EPA, OSHA, the Council on Environmental Quality, and pushed hard for the Clean Air Act.
For those that do not know, that man was Richard Nixon.
He was a Moderate Republican at the time, and was known for working closely with one of the most famous Conservative Democrats during their time in the senate. The two were friends, and even campaigned for each other. And if Nixon had failed to get his party's nomination for President in 1960, he had stated many times he would have endorsed and campaigned for this Democrat.
Of course, that was John Kennedy.
The middle of both parties has largely stayed the same, and the Republicans have shifted a bit to the Right over the decades. But it is the Democrats that made the wild shift around 45-50 years ago. And somebody only has to consider this to realize that fact.
Prior to the Depression, every black member of Congress was a Republican. And even from the election of Arthur Mitchell of Illinois in 1935, every single one was from a Northern or Western state. New York, Illinois, California, Michigan, it goes on and on. Not until 1973 did a black get elected from a former Confederate State (Texas) to Congress as a Democrat. That should show how far that party had shifted in the prior decade.