Barron Trump
Biden's note follows a 36-year tradition between outgoing and incoming presidents in the White House
The first lady previously rushed to defend her 18-year-old son Barron after he went viral online
The world watched on as the 18-year-old celebrated his father Donald Trump's inauguration on Monday (20 January)
It's just one of many executive orders Trump signed off in his first 24 hours as president
People online were seriously baffled by the brief exchange
Donald Trump's inauguration as the 47th President of the US saw his son, Barron, interact with Joe Biden
Barron Trump's appeared onstage during father's presidential inauguration
President-elect Donald Trump is set to return to the White House later this month
Donald Trump will become the first person convicted of a felony to assume the presidency following his inauguration next Monday (20 January)
The internet has been pretty stunned by yet another famous 'massive' son
Melanie Trump shares her 18-year-old son with incoming Republican president Donald Trump
First we had Gary Barlow's 'massive' son, now Donald Trump's son