These theories are fueling pro-Trump rhetoric ahead of the November 3 midterm elections, even as polls rather favor the Democrats.
Debris was found over hundreds of meters around.
Others mention a shot from the anti-aircraft defense recently installed at Mar-a-Lago.
On social networks, internet users see the crash site as a suspicious clue.
For now, nothing confirms any of these hypotheses.
Some claim it was a kamikaze plane specifically targeting the residence.
The U.S. president was not on site at the time of the accident.
The highly shocking images of the impact have circulated widely.
Some argue it was not a plane but a missile, citing a lack of large debris according to them.