Donald Trump's lawyers are trying to block Ashlee Humphreys, an expert witness from Northwestern University, from testifying against Trump in a new defamation lawsuit brought by E. Jean Carroll. In a subsequent trial, Humphreys has revised her assessment of Carroll's reputational damage from $2.7 million to $21 million due to Trump's denials of assault. At the same time, he was president, following her initial testimony earlier in the year.