As Trump’s monologue about his Texas midterm convention exposes a problem for the GOP, a Democratic operative argues that his collapse in South Texas is a real tell about what’s coming.

This week, GOP Senate candidate Ken Paxton privately admitted that Donald Trump’s midterm convention in Texas was a serious problem for the state’s Republican candidates. Asked about this, Trump unleashed a long, tortured monologue, and it was revealing. He kept returning to the number of viewers that he got at the convention, and kept repeating that he won Texas multiple times. He can only see this in terms of how he fared there, with no regard for GOP candidates. We think that Trump’s inability to clearly…