Sources suggest that Judge Cannon made this this ruling so as to appear unbiased and not unduly delaying proceedings.
"Judge Cannon sets Trump trial for August, but it’s not likely to stick
The judge presiding over the Justice Department’s criminal case against former president Donald Trump said Tuesday that the trial could begin as early as Aug. 14 — a timetable that is likely to be pushed back as lawyers navigate the complexities of an unprecedented case that hinges on highly sensitive classified documents."
