It was a combination of factors.
He did not have the resources to combat the combined Democrat, Republican and media smear machine onslaught after the NRSC and RNC pulled all their funding
I supported Roy Moore and I'm an independent voter.
My wife is a college grad and about as hard core Republican as they come and she bough the sexual predator story hook, line and sinker.
The venom the smear campaign built up in her against Roy Moore is stunning and she is 100% sure the allegations are true.
Never underestimate the skill the Democrats have at smears and dirty tricks and the Republicans played right into their hands. They can crate an entire alternate reality totally devoid of facts with their propaganda and echo chamber tactics and get enough people to suspend disbelief until after the election to get their guy over the finish line.
Obama and Soros connected groups pumped about 10 million bucks into the election in the last 48 hours so a staggering amount of walking around money hit streets in the urban areas.
I hope this debacle brings down McConnell
On the other hand, Moore really did not defend himself aggressively enough. A political street fight like this one really separates the men from the boys.
Moore should have hit pushed back on the smear campaign harder and he totally let Jones get a pass on his radical left wing positions.
Moore is a good man and good men often have trouble fighting dirty.