If that’s true, then these speculators are going to lose their shirts when the price of oil plummets. There is no way that Congress can fix this.
Speculators take positions on both sides of the market — they are both long and short on oil futures. Also, speculators are (by definition) traders — they don’t buy and hold futures contracts to the bitter end. If the contract price turns the wrong way, they will bail. A speculator may open and close positions several times a day — on alternate sides of the market, even.