Laurence Tribe is a Harvard Law School professor, highly renowned and respected.
Andrew Napolitano is a well known Fox News Channel legal commentator and an attorney, known for his conservative views.
Alan Dershowitz is, like Laurence Tribe, a Harvard Law School professor, well known for drawing attention to himself, and controversial for the people he has represented in court, including O J Simpson 25 years ago.
Tribe, a well known liberal, and Napolitano, a well known conservative who often has been supportive of Donald Trump, have joined together in their assessment of the Robert Mueller report and recent statement, making it clear that Donald Trump is guilty of obstruction of justice, and should face impeachment. Napolitano also has said that a sitting President can be indicted, despite the statements of Robert Mueller. Tribe has also said that America could lose its soul and constitutional democracy if Trump does not face impeachment.
Dershowitz has argued against impeachment, and claims that there is no evidence to demonstrate that Donald Trump has done anything to deserve such proceedings. He is often on Fox News Channel, and is seen as an apologist for Donald Trump. He has been sharply critical of the Robert Mueller investigation and its conclusions.
The battle over possible impeachment is riling the Democratic Party and the House of Representatives, with Speaker Nancy Pelosi still opposed to action short term, and instead wanting a buildup of evidence before such a move commences, while many say there is already a tremendous amount of material to promote such an initiative.