A series of blockbuster hearings from the Jan. 6 committee has put growing pressure on Attorney General Merrick B. Garland to bring criminal charges against former President Donald J. Trump over the efforts to overturn the 2020 election.Before today’s committee hearing, we speak with Andrew D. Goldstein, one of the prosecutors who led the last major investigation into Mr. Trump, about why winning a case against the former president is such a challenge.Guest: Andrew Goldstein, a federal prosecutor who was part of the Mueller inquiry into Mr. Trump. Want more from The Daily? For one big idea on the news each week from our team, subscribe to our newsletter. Background reading: Mr. Trump has issued a rambling 12-page statement containing his usual mix of outlandish claims, hyperbole and outright falsehoods, but also, apparently, with something different: the beginnings of a legal defense.Robert S. Mueller III was often portrayed as the omnipotent fact-gatherer for his inquiry, but it was Mr. Goldstein who had a much more involved, day-to-day role. (Here’s our profile of Mr. Goldstein from 2019.)For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.