Just a heads-up. Reports are that Delta is very sporadic on notifying customers of cancellations. This has been my experience in the past too.
Current reports seem accurate, as a family member didn't get notice of cancellation from Delta yesterday until after the flight would have taken off. He checked the flight all morning, and it was cancelled about four hours before takeoff without an email or app notification. The cancellation may or may not have been related to the shutdown, but either way, the lack of notification is frustrating, and also not that unusual from Delta's outdated IT.
Be sure to keep an eye on your flights or even use a monitoring app. If my flight is in my Google Wallet, I often get notices of flight issues, like delays or cancellations, before I hear from Delta.