Gibbs trying to drive a wedge between the Pearson Specter Litt lawyers isnt helping matters, either.
In light of the discovery that the prosecution has found Trevor, Mike decides hes going to represent himself.
If Mike loses the trial run, Mike will shut up and let Harvey defend him.

Credit: Shane Mahood/USA
Furthermore, Mike believes he has a leg up on Harvey because he is fighting for his life.
And, Harvey does have a point.
Suitshas done the wholemock trial thingbefore.
To be honest, I cant remember exactly how that went, but thats not really important.
Harvey calls Rachel to the stand and, boy, he doesnt hold back.
Basically, he has a humanity switch like vampires on The CW.
However, Rachel emerges from this terrible experience slightly wiser.
She tells Mike not to defend himself in court.
(Remember, Louis gave Sheila a ticket to Argentina.)
Everyone shows up the next day for the first day of Mikes trial.
Eventually, she asks Donna if Mike went to Harvard and Donna pleads the fifth.
Its an interesting character moment because it reminds us that Donna isnt as unflappable as she seems.
Not even she can stand up against a U.S. Attorney out for blood.
Thankfully, Mike and Harvey have one ace up their sleeve: Jimmy.
But, Harvey channels his inner Storm by raining on his parade and saying that wasnt enough.
Their performance in court has convinced Harvey of one thing: Mike needs to defend himself.
when he resigned and then returned as a named partner.