MSNBC Guest: It's Not Spying on Trump, This is an "Investigative Technique"

On MSNBC's MTP Daily, Chuck Todd brings on Chuck Rosenburg, former U.S. Attorney to talk about Attorney General Barr using the word 'spying'

Rosenburg tells Chuck Todd nah,  it's not spying, "this is a tried and true investigative technique"..."what they are doing (the FBI) is running a predicated investigation"