Former President Barack Obama was spotted golfing in Hawaii just days after he reportedly urged President Joe Biden to make major adjustments to his 2024 campaign, according to the Daily Mail.

Obama is said to have been quite explicit in warning Biden and his campaign to not underestimate the odds of former President Donald Trump, the presumptive Republican nominee, defeating the incumbent president in a rematch of the 2020 election.

Biden campaign needs to make some changes

The Washington Post reported earlier this month that, according to multiple unnamed sources, former President Obama recently joined President Biden for a secret lunch meeting in the White House to discuss his concerns about the 2024 campaign and other issues related to the presidency.

Obama was described as being "animated" in cautioning Biden about the real possibility that former President Trump could regain the presidency and urged his former vice president to take his "formidable" 2020 rival more seriously.

His advice included urging a significant restructuring of Biden's campaign, such as moving more of his senior advisers from the White House to his campaign headquarters in Wilmington, Delaware, as well as granting more autonomy to his campaign leadership to make more operational decisions on their own without first clearing everything with Washington D.C.

Trump has a real chance of winning

Obama is also said to have advised Biden's campaign to be more "agile" and "move aggressively" against Trump sooner and more often, given that Trump has all but locked up the GOP nomination even as the primary election season has just now gotten underway.

That article from The Post, citing anonymous sources, reported that former President Obama is concerned that President Biden's campaign has underestimated former President Trump's strengths headed into 2024, including his "intensely loyal following," how "polarized" the nation has become, and the support that he will receive from conservative-leaning media.

Indeed, RealClearPolling's average of 2024 polls currently shows that Trump is leading Biden nationally by around 1.3 points in a prospective rematch of 2024 but maintains even larger leads over the incumbent in several of the most important swing states.

Biden's low approval and advanced age a real concern

But Obama also has concerns about Biden too, in terms of his capability to win re-election given his dismal job approval numbers as well as the public perception of his age and health.

According to FiveThirtyEight, Biden's average approval rating currently sits at just 38.2%, more than 18 points below his disapproval rating of 56.3% -- numbers that are actually lower than Trump's 43% approval at the same point in his presidency.

As for Biden's age -- he would be 82 at the start of a second term and 86 upon finally leaving office -- Axios reported last month that his years have caught up with him and noticeably slowed him down even as he continues to dismiss or downplay the increasingly obvious effect.

Yet, while Biden may be dismissive of his advanced age, voters are not, and polling has consistently shown that nearly three-quarters of Americans harbor some level of concern about the president's ability to effectively govern the country, much less serve out the entirety of another four-year term in office.

Sage advice that Biden likely doesn't want to hear

President Biden may not like it, but former President Obama is likely correct in warning his former vice president that he and his campaign need to step up their game in advance of a likely rematch of the 2020 election against former President Trump.

That prior election was a heartbreaker for Trump and his supporters, but it could be Biden and his supporters who are feeling the heartbreak in November if his campaign doesn't get more serious and treat Trump as the formidable candidate that he is.