I am using "latching onto a soundbite" to describe the strategy of repeating (sometimes for years) a single statement by a politician that turned out to be incorrect. Thus, the "Trade wars are easy to win" being repeated over and over is latching onto a soundbite.
By contrast, the original post in this thread was a discussion of a tweet that happened yesterday. Trump put it out there for our consumption, and I was commenting on it in real time. That isn't latching onto a soundbite, it is reacting to a current statement.
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