White House staff have been quietly nervous that heads might roll after 100 days, with a staff shake-up possible if Trump doesn't see some major victories soon.
Mr Trump's first 100 days will fall on April 29.
A week before Donald Trump marks the first 100 days of his presidency, he already appears to be dampening down expectations of how it will be viewed.
The biggest success of Trump's young presidency, alluded to in his tweet, has been the nomination and confirmation of Supreme Court Justice Neil Gorsuch, whom Trump picked to replace the late Antonin Scalia. After a rocky period during his first few weeks, when an executive order to block the entry of citizens from six Muslim-majority countries was blocked by the court and his national security advisor, Mike Flynn, was obliged to stand down after it was revealed he lied about a conversation with a Russian diplomat. Trump wrote on Twitter Friday morning.
Toward the end of his presidential campaign, Trump issued a "Contract With the American Voter" that, among other things, promised that he would introduce and "fight for" 10 specific pieces of legislation. But his first major legislative initiative, replacing the Affordable Care Act, failed in dramatic fashion last month, and a Trump-backed tax reform plan has not yet taken the floor in Congress.
In November, President-elect Trump even posted a video about "policy plan for the first 100 days".
Since then, the first 100 days has been the test of a new president's productivity, though none have come close to matching FDR.
"There are those that say I've done more than anybody in 100 days", Trump said February 28 on Fox.
Trump's travel ban, the policy version of a proposal that began during the GOP primary as a promise to ban all Muslims from entering the USA, has also stumbled out of the starting blocks.