U.S. President Donald Trump holds a signed executive order during an event in The Villages, Florida, U.S., on Thursday, Oct. 3, 2019. EveEdelheit | Bloomberg | Getty Images

President Donald Trump signed an executive order Thursday that he said would improve private Medicare plans for seniors, slamming Democrats for what he described as putting health care "under threat" with "Medicare for All" proposals. Trump, speaking for an hour at a campaign-style rally at a retirement community in Florida, offered few details on his executive order and spent most of his speech attacking the health policies of 2020 Democratic presidential contenders. He said as long as he's president, "no one will lay a hand on your Medicare benefits." "Medicare is under threat like never before," Trump told the crowd. "I will never allow these politicians to steal your health care and give it away to illegal aliens."

Shortly after Trump's speech, Health and Human Services Secretary Alex Azar said the president has "directed HHS to take a number of specific, significant steps that will meaningfully improve the financing of Medicare, advance the care American seniors receive from their doctors, and improve the health they enjoy." Azar said those steps including lowering costs in Medicare Advantage, allowing those beneficiaries to create savings accounts and accelerating access to the latest medical technologies after being approved by regulators. Earlier Thursday, senior administration officials said Trump was expected to issue an executive order making changes to the Medicare program to "protect" Americans from Democratic health-care proposals they said would "destroy" coverage for seniors. The executive order is intended to bolster Medicare Advantage, which is private Medicare insurance for seniors, the officials said on a call with reporters. The plan would also offer more affordable plan options, encourage wider use of telehealth services, promote wellness benefits and bring payments in Medicare fee-for-service program in line with payments for Medicare Advantage, officials said. Watch: Trump announces executive order aimed at improving Medicare Gerard Anderson, professor of health policy and management at Johns Hopkins University, said the administration's changes were incremental and it could have proposed more benefits like, "r offering dental and vision benefits which would bring Medicare up to private sector benefits."