The final straw in the current controversy over whether Trump should be impeached isn’t an explicit pro quid quo conversation — aid in exchange for an investigation of Biden and his son — between Trump and the Ukranian President, but simply the request by Trump to the president of the Urkraine to dig up dirt on the Bidens. And about that there is no controversy —- we already have the words of Trump and Guiliani, captured in more than one interview, of making such a request..