The man accused of attempting to assassinate Donald Trump near his Florida golf course earlier this month is due in court on Monday where prosecutors will argue to keep the suspect in jail until his trial.

The hearing may see prosecutors reveal new details about the investigation.

It comes after the suspect named as Ryan Routh allegedly pointed a rifle through the tree line while the former US president was playing golf at his course in West Palm Beach, according to a criminal complaint.

The suspect did not fire a shot during the encounter on September 15, standing a few hundred metres away from the Republican presidential candidate who was not in the line of sight.

The suspect fled the scene, leaving behind rucksacks and a GoPro camera after a Secret Service agent spotted the weapon and opened fire. He was later arrested along a Florida highway and has been behind bars since.

It is not clear if he knew that Trump would be playing golf at the course, though the former president often visits it when in town.

Cellphone data showed that the suspect may have been waiting in the area for nearly 12 hours before the gun was spotted, the criminal complaint revealed.

Routh, 58, has not yet entered a plea and has been faced with two federal gun crimes charges.

It is expected more charges could follow as the investigation continues.

Authorities have not yet divulged a motive for the incident, which the FBI has said is being investigated as an apparent attempted assassination of Trump ahead of the November presidential election.

The incident followed the case of another gunman wounding the former president on the ear during a campaign rally in Butler, Pennsylvania, two months earlier.

Gunshots rang through the crowd as Trump sustained a minor injury to his right ear. That gunman was shot and killed by the Secret Service.

The incidents have ratcheted up the already tense partisan nature of the American political system, amplified by extreme rhetoric, ahead of the November election.

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