White House physician Kevin O'Connor offered a glowing report about President Joe Biden last week, declaring him to be "healthy" and "vigorous." 

O'Connor's predecessor doesn't buy that assessment, however, insisting that the White House is engaged in a coverup. 

"Biden's mental health is in total decline"

Texas Republican Rep. Ronnie Jackson served as White House physician under Presidents Bush, Obama, and Trump, and he doesn't think O'Connor's report should be taken seriously. 

"The majority of Americans can see that Biden's mental health is in total decline, yet there is no transparency from the White House on what’s going on, if anything, to address this issue and his inability to do his job," Jackson told Fox News on Friday.

"Yesterday's written physical exam report released by Biden’s physician, Kevin O'Connor, further confirms that this administration is still adamant about concealing the truth," he continued.

"Nowhere in the report was there mention of Biden’s deteriorating mental health," the Republican lawmaker went on to complain.

"The cover-up needs to end"

"This is alarming, considering I have already sent three letters to the White House demanding that Biden receive a cognitive test and that the results be made public, all of which have been ignored. Everyone can see something is wrong — the cover-up needs to end," Jackson insisted.

Fox News pointed out that this is not the first time Jackson has publicly questioned Biden's competency. What's more, the congressman recounted in his autobiography how former President Obama once sent an email condemning his criticism.

"I have made a point of not commenting on your service in my successor’s administration and have always spoken highly of you both in public and in private," Obama wrote.

You always served me and my family well, and I have considered you not only a fine doctor and service member but also a friend," the former president stressed.

Obama says Jackson's attacks on Biden are "disrespectful to me"

"That’s why I have to express my disappointment at the cheap shot you took at Joe Biden via Twitter. It was unprofessional and beneath the office that you once held," Obama asserted.

"It was also disrespectful to me and the many friends you had in our administration. You were the personal physician to the President of the United States as well as an admiral in the U.S. Navy," he added.

"I expect better, and I hope upon reflection that you will expect more of yourself in the future," Obama concluded.