It's my understanding that it was traced definitively to Taylor Farms, but the only positive test may have been a false positive.

You don't always get a positive test, but this doesn't necessarily prevent you from concluding the cause of food contamination.

Taylor Farms also gave Maga Inc a million dollars six days after the FDA pushed a food safety rule back.

At this point, why would I trust what they say?

How can you believe this?, look at the signs. Its too obvious someone got paid to say that.