Trump’s Tulsa rally: Small setback or sign of trouble?

What’s happening: After months without any in-person events, President Trump intended to get his reelection campaign back up and running with a raucous rally in Tulsa, Okla., on Saturday. Things didn't go as planned.

Despite claims that more than 1 million tickets had been requested, only about 6,200 people attended. News coverage of the rally showed whole sections of empty seats in the arena. A second stage had been erected outside the venue so the president could address what was expected to be an overflow crowd of thousands. It was...