Deadly Sins of Left & Right

American Compass runs a couple of interesting features from partisan thinkers criticizing their own side.

Here’s leftist academic Ruy Teixeira talking about the Five Deadly Sins of the Left. Even though the Left is probably going to win this next election, that’s a sign of Trump’s weakness, not the Left’s strength, says Teixera, because the truth is, “the public just isn’t interested in buying what the Left is selling.”

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Meanwhile, conservative think-tanker Henry Olsen shares his Three Deadly Sins of the Right. He begins by asking why it is that for the last 90 years, more Americans have said they are Democrats than Republicans, even when Republicans when national elections?

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What do you think? What do you believe are some deadly sins of your own side? Or if not deadly sins, then at least things that make the party less successful or appealing than it really ought to be?