As the impeachment alarm has engulfed President Donald Trump's White house and a second whistleblower has come forward about the former's dealings with Ukraine and asking for dirt on his political opponent Joe Biden, Americas top legal minds weighed in on the big questions that were consuming Washington D.C.: Is Trump asking for dirt from a foreign country an impeachable offence? Was this about personal interest or foreign policy? Does the House have enough evidence to impeach Trump? What does this moment mean in the wide arc of Americas history? Is this what impeachment was made for?