I have a piece on CNN.com explaining that Ted Cruz should recuse himself from Senate Judiciary Committee hearings on President Obama's eventual nominee to the Supreme Court.
Here is the gist of his conflict of interest:
Cruz's claim to "natural born" United States citizenship has been questioned (bombastically) by Donald Trump, and (very seriously) by a number of highly respected legal scholars, including Harvard's Lawrence Tribe and the University of Chicago's Eric Posner.
It is far from a given that Cruz is constitutionally qualified to be president, and his status, if nominated, is sure to be challenged in court.
Such a case would ultimately reach the U.S. Supreme Court, which gives Cruz a unique stake in filling the current vacancy. If Cruz were to remain an active member of the Judiciary Committee, he would actually have a chance to interrogate -- and to vote upon -- his own potential judge.
You can read the whole essay here.