Despite Cannon's rejection of these attorneys general's attempt to get involved in the classified documents case, it was a noble effort by prominent Republicans to stop the lawfare the Biden administration is throwing at Trump. A gag order against someone running for the nation's highest elected office is unconstitutional, especially when requested without the backing of any evidence that anyone has felt threatened or been put in danger.
Considering how Cannon has slow-walked hearing arguments on this issue and this entire case — not to mention her suspicious pro-Trump rulings on other matters in this case — it's surprising she rejected these efforts. However, Trump may still be able to continue making dangerous statements because there's little reason to believe she won't again rule for Trump after arguments are heard on Smith's gag order request.