Democrats are expressing concern that advisers and aides to former President Obama have already begun signaling which candidate they might support for the White House in 2020.

Valerie Jarrett, one of Obama’s closest confidantes, and David Simas, the CEO of Obama’s foundation, have sent smoke signals urging former Massachusetts Gov. Deval Patrick (D) to enter the race.

Simas, who once served as a top aide to Patrick, is an ardent supporter of the former governor, sources tell The Hill, while Jarrett has privately told friends that she would do what it takes to support him.

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And Politico reported last month that Jarrett believes a President Patrick is “what my heart desires.”

At the same time, friends of Jarrett’s say that while she would love for Patrick to run, she is also open to other candidates.

Others in Obamaworld have quietly been buzzing about the excitement behind a potential Patrick run.

Axios's Mike Allen mentioned Patrick as a favorite in Obamaworld in his popular newsletter on Friday.

Other former aides close to Obama say they would support a run by former Vice President Joe Biden Joe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE, if he decides to launch a bid in 2020.

Obama has not weighed in publicly on the next presidential race, and those around him have said he isn’t looking to tip the scales and believes it is too early to back any one candidate.

But the reports of Jarrett’s and Simas’s interest in Patrick have left people wondering what the former president is thinking.

One top Obama fundraiser, however, said it’s clear the inner circle has a clear favorite in Patrick and that it’s no coincidence they’ve put that storyline out there.

“It’s blatantly overt,” the fundraiser said told The Hill.

The fundraiser speculated that one reason Obama’s circle is putting out smoke about Patrick is to take away oxygen from Sen. Kamala Harris Kamala HarrisThe Hill's Campaign Report: Trump and Biden vie for Minnesota | Early voting begins in four states | Blue state GOP governors back Susan Collins Kamala Harris: Black Americans have been 'disproportionately harmed' by Trump Biden town hall draws 3.3 million viewers for CNN MORE (D-Calif.).

“A lot of people in our world see Deval as the one who will carry the Obama legacy. Kamala has labeled herself as the female Obama, but Deval was Obama before Obama was Obama,” the fundraiser said.

Obama’s office did not comment for this story. Jarrett declined to comment. Simas did not respond to a request for comment.

Democratic insiders are expressing worry about some of the talk, and they say it’s much too early to be pushing one particular candidate.

“There is little appetite in the party to settle on a candidate early,” said Democratic strategist Jamal Simmons.

Many Democrats and Republicans believe the 2020 race will be wide open and that a couple dozen Democrats could even run for the party’s presidential nomination.

It’s difficult to see either Patrick or Harris becoming a frontrunner in the race, particularly with Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) signaling his continued interest. Sanders will attend two events on Monday in New Hampshire.

Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) is another potential favorite and frontrunner should she choose to enter the race.

“I want to see a wide-open a process where there are no front-runners,” Democratic strategist Jim Manley said. “The idea that anyone is out there pushing for one person or another is a mistake.”

While the 2020 election is still more than three years away, potential candidates must already prepare for the possibility of a race.

The fight for key staff members and donors will not be delayed.

One former aide to Clinton said there’s danger in Obama heavyweights being seen as aligning with a candidate, because it could deepen factions within the party.

The fight between the Sanders and Clinton wings from the 2016 primary has left scars, with supporters of both candidates blaming the other, at least to a degree, over President Trump’s victory.

Still, some strategists say even if the Obama allies have their favorites, it won’t matter much in the end.

“Party insiders don't have a great track record of picking successful Democratic nominees,” said Simmons. “They didn't pick Jimmy Carter, Bill Clinton William (Bill) Jefferson ClintonBarr says Ginsburg 'leaves a towering legacy' Trump reacts to Ginsburg's death: 'An amazing woman who led an amazing life' Jimmy Carter remembers Ruth Bader Ginsburg as 'a beacon of justice' MORE or Barack Obama Barack Hussein ObamaObama calls on Senate not to fill Ginsburg's vacancy until after election Senate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week MORE.”

“The best idea is to wait and see who Dem voters feel some affection for and rally around that person to help them win,” Simmons said.

Manley agreed.

“I’m not so sure it’ll matter at the end of the day,” he said. “We’re looking at a long slog. 2020 is a long ways away.”