Truthfully, if President Trump does nothing, Roy Moore is likely to win. But if President Trump does *anything*, it could backfire.
So the best bet is for President Trump to make a very private phone call to Roy Moore, and *explain* the situation to him, then offer him private encouragement, plus to sweeten it for him by offering him financial support from other than the RINO establishment that has cut him off.
Importantly, a wild card, some retired Marine Col. named Lee Busby, has suddenly announced he is entering the race as a write in vote, which stinks on ice. Busby spent 31 years in the Marine Corps and on his last tour of duty was vice chief of staff to then-Gen. John Kelly, who is now White House chief of staff.
https://www.thedailybeast.com/marine-col-lee-busby-announces-hes-running-against-roy-moore
This sounds like an insider effort to cost Moore just enough votes to give the Democrat a win.
Which means that President Trump might have yet *another* snake in the woodpile, and he needs to find out about it ASAP. If it is Kelly himself, that is good enough to fire him. But if this retired Colonel is the front man of some other scheme, it is a clear and present danger to President Trump.
That Busby character is who the RINO snake, Richard Shelby, voted for.
Another version of Evan McMullin, better known as Egg McMuffin.