In spite of (or perhaps because of) the very brief government shutdown over the weekend, SpaceX is moving forward with preparations for this historic launch.
Casual observers have given the launch a 50% chance of success. Failure, in this case, is a learning experience.
SpaceX Test Fires Falcon Heavy Rocket – ExtremeTech
https://www.extremetech.com/extreme/262769-spacex-test-fires-falcon-heavy-rocket