Jackson is expected to announce the full results of the president's exam on Tuesday.
The exam at Walter Reed Medical Center in nearby Bethesda, Md., will be the first for Trump since he took office almost a year ago.
A reporter asked Trump on Thursday how he thought Friday's physical would go.
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Pete and Sarasota, also says it will continue to distribute and urged customers to contact their representatives in Congress . Attorney General Jeff Sessions that clears the way for federal raids and prosecution of growers, distributors and sellers.
If the reports are true, Donald Trump's doctor could have some stern words for the president when he carries out his check-up later today.
They also underscore the importance of Jackson carrying out the evaluation of Trump's mental health and neurological functioning (and making appropriate referrals) by pointing out that an expert group tasked with assessing a president's neurological status-as former President Jimmy Carter proposed-has not yet materialized.
Bornstein's report on Trump's health veered toward the hyperbolic, but White House physicians are typically more buttoned-up in their assessments of presidents' health.
Past presidents are not known to have been tested for mental acuity while in office - including Ronald Reagan, who five years after leaving the White House was diagnosed with Alzheimer's disease.
In an interview with The New York Times past year, Dr. Bornstein revealed that Mr. Trump takes a small dose of finasteride, a drug that is marketed as Propecia, to treat male-pattern baldness; the drug lowers levels of prostate-specific antigen, an enzyme made by the prostate.
According to a recent book Donald Trump is a big fan of fast food and soft drinks.
El Salvador president Salvador Sanchez Ceren also criticised Mr Trump, saying he "protests and energetically reject those types of statements". Because the health information is considered private under federal law, the President himself must sign off on its release.
What precisely will be disclosed about the President's health isn't yet clear.