So here is the article from The Intercept:
PRUITT CALLED TRUMP A THREAT TO CONSTITUTION IN 2016 INTERVIEW
In a stinging 2016 radio interview, Scott Pruitt lambasted then candidate Donald Trump, warning of the danger to the constitution should he become president.
“If Donald Trump is the nominee and eventually the president, he would take i think, unapologetic steps to use executive power to confront Congress in a way that is truly unconstitutional”, said Pruitt.
The interview was recorded on February 4, 2016 in Tulsa, Oklahoma for the Pat Campbell radio show, and uncovered by Documented.
“I believe that Donald Trump in the White House will be more abusive to the constitution than Barack Obama and that’s saying a lot,” said Pruitt.
Here is the Ambush by Sen. Whitehouse
Most importantly my explanation of how and why this all went down.