What is the legal test for challenging the factual sufficiency of the evidence in a civil case?

In thus challenging the factual sufficiency of the government's case, defendants face a "heavy burden, as the standard of review is exceedingly deferential." United States v. Brock, 789 F.3d 60, 63 (2d Cir. 2015) (internal quotation marks omitted). We analyze the sufficiency of the evidence "in the light most favorable to the government, crediting every inference that could have been drawn in the government's favor, and deferring to the jury's assessment of witness credibility and its assessment of the weight of the evidence," and will

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uphold the conviction "if any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt." United States v. Chavez, 549 F.3d 119, 124 (2d Cir. 2008) (citations, alteration, and internal quotation marks omitted).