Oprah Winfrey speaks after accepting the Cecil B. Demille Award at the 75th Golden Globe Awards in Beverly Hills, California, Jan. 7, 2018.
Oprah Winfrey speaks after accepting the Cecil B. Demille Award at the 75th Golden Globe Awards in Beverly Hills, California, Jan. 7, 2018.

Just days into 2018, the race for the U.S. presidency in 2020 is already making headlines.

When asked Monday aboard Air Force One about a potential high-profile general election opponent to President Donald Trump — namely, self-made billionaire media proprietor and philanthropist Oprah Winfrey — deputy White House spokesman Hogan Gidley responded, "We welcome the challenge, whether it be Oprah Winfrey or anybody else."

Winfrey, 63, however, is not running — at least, officially. But her Sunday night speech at the Golden Globe awards show unleashed immediate and intense media speculation about a candidacy in 2020, presumably as a Democrat.

"I don't know if he saw it," Gidley responded to a reporter's question about whether Trump saw Winfrey's impassioned speech in which she made no mention of him or the presidency.

However, her remarks about being raised in poverty, empowerment of women and support for the press (under constant criticism by Trump), quickly prompted even some conservative political figures to speak positively of her as a potential candidate.

Winfrey, when asked backstage if she planned to run for president, replied, "I don't. I don't." But some close to her were quoted Monday saying she is thinking about it.

Her long-time partner, Stedman Graham, was quoted Sunday evening telling The Los Angeles Times, "It's up to the people. She would absolutely do it."

In a television interview early last year, Winfrey indicated that Trump's election had changed her mind about whether she lacked experience for America's highest office. But in another TV interview in October, she dampened speculation, stating, "There will be no running for office of any kind for me."

Winfrey, as was the case for Trump before being elected president, has never held public office.

Trump on Monday, speaking to a national convention of farmers in Tennessee, did not mention Winfrey's name or make any reference to his re-election campaign.

"Our country's getting its confidence back again," Trump said of his nearly one year in office. "We are witnessing a new era of patriotism, prosperity and pride."

In the past, Trump has spoken positively of Winfrey. In a 1999 television interview when he said he was thinking about running for president the following year (although he did not), Trump declared, "Oprah would always be my first choice" for a running mate, adding, "she's brilliant" and "a very exceptional woman."

Trump's daughter Ivanka praised Winfrey's speech in a late Monday tweet.

Winfrey endorsed Democratic Senator Barack Obama of Illinois when he first ran successfully for the U.S. presidency in 2008, and former U.S. Secretary of State Hillary Clinton in her losing 2016 campaign against Trump.

FILE - Democratic presidential candidate U.S. Sena
FILE - Democratic presidential candidate U.S. Senator Barack Obama, left, his wife Michelle, center, and talk show host Oprah Winfrey wave to the crowd at a campaign rally in Manchester, New Hampshire, Dec. 9, 2007.

No clear Democratic front-runner has emerged to challenge Trump in 2020, with the immediate political focus in the U.S. on November's congressional elections, when the 435-member House of Representatives will be up for election, along with a third of the 100-member Senate.

In the months after the congressional elections, halfway through Trump's four-year term, Democratic presidential challengers are likely to begin announcing their candidacies to run against him.

VOA's Ken Bredemeier contributed to this report.