Oprah Winfrey leads Democratic Sens. 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 (Mass.) and Kirsten Gillibrand Kirsten GillibrandSuburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits The Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida MORE (N.Y.) in hypothetical primary match-ups, according to a new Politico/Morning Consult survey.

The media mogul holds a 4-point lead over Warren among Democratic voters, with 39 percent choosing Winfrey and 35 percent favoring the Massachusetts Democrat in the poll.

In a head-to-head match-up against Gillibrand, Winfrey's lead grows to 21 points, 44 to 23 percent, pollsters found.

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But other potential Democratic presidential candidates still hold a lead over Winfrey, particularly 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 and 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.).

Winfrey trails Biden by 23 points, 54 to 31 percent, in a hypothetical primary match-up, according to the Politico/Morning Consult poll. And in a match-up against Sanders, Winfrey trailed by 9 points, 46 to 37 percent.

Winfrey leads President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE by 2 percentage points, 40 percent to 38 percent, among all voters in a head-to-head match-up.

The poll surveyed 1,993 registered voters between Jan. 11-16. Its margin of error is 2 percentage points.

Speculation about the media mogul potentially mounting a presidential bid in 2020 swirled last week after she gave an impassioned speech at the Golden Globes.

That speech addressed sexual harassment in the entertainment industry and elsewhere, but also took on broader themes. It was capped off by the line, "a new day is on the horizon," stirring speculation about a possible campaign slogan.