It is the second time Mueller tried to delay the trial
Former federal prosecutor and National Review Contributing Editor Andrew C. McCarthy told TheDCNF it was too late for Mueller to claim that the complexity of the case warranted a delay.
http://dailycaller.com/2018/05/23/mueller-delay-russia-trial/
It appears the the Mueller team may be using the same delay tactic that is "an attempt to chew up the defendants resources.
interesting.... Sensitive Deep State Secrets @QAnonsense May 21 BREAKING: New HRC disclosures imminent. $$$ laundering. XXX trafficking. Huma singing. LL, BHO compromised. IC in panic mode. CIA Dir JBrennan scheduled for CTOP. [Canoe Trip on the Potomac] #QAnon #QAnonPosts