Yesterday I posted a link to a review of the briefs filed in Trump's upcoming impeachment trial. See here. Today, the New York Times is reporting that 144 law professors have signed a letter providing further analysis and concluding that Trump's arguments have no merit.
However, if you read the letter signed by the law professors more carefully, you will see that they do not all agree on the content. You can read the letter for yourself here, and then you can read an analysis of what it says here.