Vice President Kamala Harris is in "excellent health" and "possesses the physical and mental resiliency" required to serve as president, her doctor said in a letter released Saturday that summarizes her medical history and status.

Dr. Joshua Simmons, a U.S. Army colonel and physician to the vice president, wrote that Harris, 59, maintains a healthy, active lifestyle and that her most recent physical last April was "unremarkable."

She "possesses the physical and mental resiliency required to successfully execute the duties of the Presidency, to include those as Chief Executive, Head of State and Commander in Chief," he wrote in a two-page letter.

Harris' advisers hope to use the moment to draw a contrast with Republican Donald Trump, who has released only limited information about his health over the years, and raise questions about his fitness to serve, according to a campaign aide who spoke on condition of anonymity to discuss sensitive matters.

Trump has released very little health information, including after his ear was grazed by a bullet during an assassination attempt in July.

Trump, 78, eagerly questioned President Joe Biden's health when the 81-year-old president was seeking reelection. Since Biden was replaced on the ticket with Harris, who is 59, Trump's own health has drawn more attention.

Last November, Trump marked Biden's birthday by releasing a letter from his physician that reported the former president was in "excellent" physical and mental health.

The letter posted on Trump's social media platform contained no details to support its claims — measures like weight, blood pressure and cholesterol levels, or the results of any test.