Former Democratic House Speaker Nancy Pelosi refused to explicitly support President Joe Biden as the party's presidential nominee.
Pelosi was also said to have urged colleagues in Congress to break from making public statements either for or against Biden.
CNBC explained that, speaking to MSNBC, Pelosi stated: "Let's just hold off. Whatever you're thinking, either tell somebody privately, but you don't have to put that out on the table until we see how we go this week."
Biden has continued to reiterate that he will not drop out of the race, pushing on with his re-election bid, despite the concerns of some fellow Democrats.
CNBC speculates that Pelosi's comments suggest she feels Biden is still determining whether or not to remain in the running.
"It's up to the president to decide if he is going to run," Pelosi added. "We're all encouraging him to make that decision because time is running short."