Just my humble opinion...
If Dave's info is correct, (and we have no way of knowing that for sure) and they're waiting on election results, there's a number of scenarios that could play out.
If Comcast is 100% in on the new park, and the time frame is the only thing undetermined, at this point in time...
*If the Dems win the trifecta (Pres., House, Senate), the 2017 big time corporate tax/investment breaks law is probably history, and will be replaced by new, less corporate friendly, legislation.
In that scenario, if Comcast is for sure on Epic, it would probably be in their best corporate interest to start building, and spending, as soon as possible, while the investment breaks still exist.
* If the election ends up with one party only controlling two of the trifecta, chances are the 2017 corporate breaks stay as they are. In that scenario, Comcast could take their time opening/building the park.
If Comcast is not 100% for sure on whether to build Epic, due to all the covid related economic factors.
*If the Dems win the trifecta, they might just cancel, knowing the tax breaks will probably end....or...
* Continue with the park figuring the Dems will have some huge stimulus that will jumpstart the economy, plus do a better job controlling covid
*Trump wins....They continue with the park, knowing the corporate tax breaks will stand, but they will have the flexibility of stringing an opening out to 2025 or so.
There's probably a few other scenarios too, but most are probably also based on how fast they think an economic recovery in tourism will take, and the status of the corporate tax/investment breaks, after the election.