From the Boston Globe:

It would be the first time in 124 years that the marathon — which regularly draws about a million spectators and thousands of visitors from around the world — wouldn’t be held as planned. Postponement is preferable because canceling the marathon would mean a potential economic loss to the city of more than $200 million.

The desire was to hold the race on a long weekend, but Labor Day was deemed too challenging because it is peak time for college students to move into dormitories, many of which are located along the marathon route. Columbus Day, another target, is regarded as impossible because the Chicago Marathon is scheduled for Sunday, October 11.

Apparently it’s all over Twitter

It's the only way we can have WH dogs. Joe has 2 german shepherd rescues, Champ and Major. Bernie and Trump don't have dogs.