BREAKING: Grand jury to hear evidence against John Bolton

We are following some breaking news on the John Bolton classified documents investigation. A grand jury is expected to hear evidence today against the former Trump national security adviser. This is another high-profile case targeting one of President Trump's outspoken critics.Of course, MSNBC's Ken Delaneian and Lisa Rubin are tracking all of the developments. Ken, what do we know about this grand jury and the potential timeline today. What we know u Ariel is that they're meeting this afternoon in federal ...