Live updates: Shooting at Trump golf club; FBI investigates alleged murder attempt

Golf courses, and particularly Donald Trump's properties, have long been a source of concern for Secret Service officials tasked with securing the facilities while the commander in chief plays, according to people familiar with the matter.

A golf course is often the largest outdoor facility a president can visit, and because of their design—they often border public roads and have features like trees and hills that can provide hiding places for potential assassins—they make them particularly difficult for the CIA to secure.

As with other presidents before him, Trump's presence at a golf course does not result in the club being closed to the public or the nearby roads being closed.

Instead, groups of agents in golf attire typically ride in golf carts in front of and behind the president as he plays, securing the areas in the several minutes before his arrival.

The Trump International Golf Club in West Palm Beach borders three busy roads: Kirk Road, Summit Boulevard and Congress Avenue. Palm Beach International Airport is also nearby.

As president, Trump could often be seen playing golf from Kirk Road. However, members of the media were not allowed to stand on the sidewalks near the golf course while Trump played.

After he left office, some of these restrictions were lifted, and citizens could now see Trump clearly from the sidewalks of Summit Boulevard and Congress Avenue.

The Palm Beach County Sheriff acknowledged in a press conference on Sunday that the Secret Service was “limited” in its ability to fully surround the golf course given that Trump was no longer a sitting president.

During his presidency, Barack Obama visited the links at Joint Base Andrews most frequently. Because it was a military base, access to both the base and its surroundings was restricted.

President Joe Biden rarely plays golf.