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Thus, while I chuckle at the Melania Trump/Columba Bush meme, I don’t think it’s useful to make a serious political/cultural argument based on it. If the cuckservative meme is to have lasting impact, it needs an important meaning beyond crude jokes.
And this can be readily be made. I doubt whoever came up with the term “cuckservative” was necessarily thinking of the cuckoo bird, which is where cuckold’s etymological roots derive from. But I believe it is instructive to compare cuckservative’ place in America and the literally cuckolded hosts in nature.

This relationship is analogous to the way cuckservatives waste all their resources appealing to blacks and Hispanics who will never support their values, and are in fact undermining them—just as the warbler gives food to the cuckoo that killed its biological offspring.
Yet this is unfair to the warbler. The cuckoo at least tries mimic the warbler. But cuckservatives persist in believing in minority conservatism even when the non-whites have explicitly disclaimed it. Thus cuckservatives pretend that Martin Luther King, a self-described socialist who attacked Ronald Reagan and Barry Goldwater, was a conservative Republican. And even though Hispanics vote overwhelmingly Democratic and tell pollsters they support big government, cuckservatives blindly insist they are “natural Republicans.” ...