The Vice President of the US announced that the administration wants the US to return astronauts to the Moon by 2024. For this to happen there needs to be a way of getting them there and the SLS will probably not be ready.
NASA acknowledged that a commercial rocket might be an option to get Exploration Mission 1 off the ground. Could the first flight of the Orion Spacecraft be on a Falcon Heavy?
Hopefully in June next year NASA will launch Exploration Mission 1 on the SLS, which will be the first step in getting humans back to the Moon.