There’s no doubt that Barack Obama is not Donald Trump’s biggest fan, but the former president’s most recent dig at the White House’s current occupant is the most brutal yet.

The 44th POTUS has very different political views to Republican president Trump – so it’s hardly a surprise Obama has called out Trump’s policies on multiple occasions. “I have deep differences of opinion with my most immediate successor — who’s now president once again,” Obama said during a speech at Hamilton College in Clinton, New York, earlier this month.

“There are a host of policies that we could be discussing where I have strong opinions,” Obama continued, stating how he believes the government’s commitment to strong principles has ‘eroded’.

Since that speech, the education department has frozen a whopping $2.3 billion in federal funds to Harvard University after the famed college rejected a list of demands set out by the Trump administration.

The White House say the demands, which were sent to Harvard in a letter last week, were designed to fight antisemitism on campus – with changes to hiring, admissions and teaching on the agenda.