Ryan Routh, the man accused of trying to assassinate Donald Trump as he played golf in Florida last September is standing trial.

Here's what to know:

The court has blocked off four weeks for the trial, but attorneys are expecting they’ll need less time.

U.S. District Judge Aileen Cannon agreed to let 59-year-old Routh represent himself, but said court-appointed attorneys need to remain as standby counsel.

Routh will be allowed to use a podium while speaking to the jury or questioning witnesses, but he will not have free rein of the courtroom.

Prosecutors have said that Routh, a self-styled mercenary leader, methodically plotted to kill Trump for weeks before aiming a rifle through the shrubbery as Trump played golf at his West Palm Beach country club.

Trump, who was the Republican presidential nominee at the time, was uninjured, and there’s no evidence that Routh fired his weapon at the golf course.

A Secret Service agent spotted Routh before Trump came into view.

Officials said Routh aimed his rifle at the agent, who opened fire, causing Routh to drop his weapon and flee.

Routh has pleaded not guilty to the federal charges, including attempting to assassinate a major presidential candidate.

Cannon is the same judge who presided over another high-profile case involving Trump — the classified documents case.

Last year, Cannon sided with Trump’s lawyers who said the special counsel who filed the charges was illegally appointed by the U.S. Justice Department.