In an unusual move, President Trump has reportedly been handing out his cellphone number to world leaders and requesting them to call him directly, according to the Associated Press. If proven true, the act would breach diplomatic protocol, further raising concerns about the commander-in-chief's communications security.
According to former and current US officials with direct knowledge of the situation, Trump urged Canadian and Mexican leaders to contact him on his cellphone. Of the two, only Canadian Prime Minister Justin Trudeau has taken Trump up on his offer so far, the officials added.
He also exchanged numbers with newly-elected French President Emmanuel Macron, a French official said, but wouldn't confirm if he intended to use the line.
The use of his personal cell details the extent in which Trump distrusts the traditional communication lines established for sitting presidents, who usually make calls on secure phone lines from the White House Situation Room, the Oval Office or the presidential limo.
Even if Trump had used his government-issued cellphone, it still opens the floodgates to hackers.
WATCH | Here's how Trump's iPhone is different than yours.
"If you are speaking on an open line, then it's an open line, meaning those who have the ability to monitor those conversations are doing so," said Derek Chollet, a former Pentagon adviser, and National Security Council official now at the German Marshall Fund of the United States.