Consider, in particular, the tweet John Cornyn put out about how the tax bill will help what he apparently imagines is an ordinary family:

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Yes, just your ordinary family that owns two businesses accounting for 40% of its income.

In reality, the vast majority of middle-class households have no business income, and for most of those who do have such income, it’s less than a quarter of their total income, let alone 40%. Meanwhile, the top 1% accounts for more than half of business income, and the top 5% for around 70% of the total. Since the value of the pass-through tax break depends on how high a marginal rate you pay on ordinary income, the benefits are even more skewed to the top.

The point is that the modern GOP basically despises ordinary working families, and this is increasingly obvious to the public. Better salesmanship won’t solve this problem.