What is the test for finding a federal conviction for improper conduct by a prosecutor in a civil case?

"When a prosecutor's intemperate behavior is sufficiently egregious that it infects the trial with such a degree of unfairness as to render the subsequent conviction a denial of due process, the federal Constitution is violated. Prosecutorial misconduct that falls short of rendering the trial fundamentally unfair may still constitute misconduct under state law if it involves the use of deceptive or reprehensible methods to persuade the trial court or the jury." (People v. Panah (2005) 35 Cal.4th 395, 462 (Panah).) "Misconduct that does not constitute a federal constitutional violation warrants reversal only if it is reasonably probable the trial outcome was affected." (People v. Shazier (2014) 60 Cal.4th 109, 127 (Shazier).)