On Wednesday, President Donald Trump revealed that he was amazed that former president Barack Obama had still not made his endorsement of his close friend Joe Biden, whom he reportedly shared a close “bromance” with.

During the briefing, Trump said that he was surprised that Obama has not yet endorsed Biden. “I don’t know why President Obama hasn’t supported Joe Biden a long time ago,” the president said. “There’s something. He feels is wrong,” Trump added.

Moreover, the president hinted that Obama already knew about Biden’s capacity as a future commander-in-chief. “He knows something that you don’t know,” he said. Trump was quick to add that he does not know the real reason, either.

However, Trump believed that Obama would have to eventually endorse Biden after Sen. Bernie Sanders dropped out of the Democratic nomination. He even claimed that Obama would be forced to endorse “Sleepy Joe,” rather than watch Trump spend “four more years” in the White House.

Unlike those who had previously dropped out of the race, Trump also questioned Sanders’ real intention on his refusal to give his delegates to Biden. The president wondered if it was just a political strategy, and believed that there might be some “weird deal” happening.

Obama and Biden’s close relationship had been well documented in the media, with some describing the two men’s closeness as a “bromance.” In 2008, Biden had served as Obama’s running mate in his presidential campaign and had also served as Obama’s second in command during his term.

In his book “Barack and Joe: The Making of an Extraordinary Partnership,” author Steven Levingston wrote that despite Biden’s claims that he had personally asked Obama not to endorse him, the former president’s lack of support for his close friend might have stung specifically because Obama chose to give his endorsement to former State Secretary, Hillary Clinton.

Levingston wrote that Obama might have felt that Biden did not represent the change that he wanted for the country. In his book, the author claimed that Biden stood out like “another white guy,” just like all the American presidents before him. On the other hand, Levington believed that Obama chose Clinton as the rightful successor because it would finally confirm his “revolutionary stamp” on the country’s “political culture.” Levingston wrote that it would be like passing a “baton” from the first black president to a first woman president.

Moreover, Trump’s statements came as a response to Sen. Bernie Sanders’s decision to quit the race. In a conference call, Sanders believed that there was no way he could catch up with Biden’s wins and that it would be better to suspend his $160 million campaign. However, Sanders assured that while his presidential bid might have come to an end, their fight for socialism did not.

The senator also described Biden as a “very decent man.” While Sanders might have announced his drop from the race, he confirmed that his name will still remain on the ballot for states that have not yet concluded their convention as a way to encourage more delegates in the upcoming Democratic convention.