At first look, Jill Biden’s work on her journeys abroad seems to be rooted within the conventional duties of first women: She has cheered on American Olympians in Tokyo, made a secret journey to Ukraine to fulfill with the nation’s first girl and attended the royal wedding ceremony of the crown prince of Jordan.

But in a bunch of speeches delivered abroad, together with in Namibia and France, she has additionally used her platform for extra political functions, together with making her case that President Biden has promoted democracy and revitalized world relationships strained by former President Donald J. Trump.

In Paris on Tuesday, the primary girl’s presence was a reminder, because the 2024 presidential marketing campaign heats up, that Americans could once more be selecting between the 2 males. Dr. Biden was there to ship remarks for the official return of the United States to UNESCO, a number of years after the Trump administration pulled the country — and its funding — from the group.

She was additionally there to ship a White House message that Mr. Biden had united allies towards what she known as “Putin’s unjust war” in Ukraine.

“When my husband, President Biden, took office two and a half years ago, he made a promise to the American people,” Dr. Biden mentioned, “that he would rebuild the systems that were broken and fortify our institutions, that he would work to bring divided communities back together, that he would put us on a path to a better, brighter future while restoring our leadership on the world stage. And he did.”

She instructed a crowd of tons of outdoor on the UNESCO headquarters in central Paris that her husband “understands that if we hope to create a better world, the United States can’t go it alone, but we must help lead the way.” The dark-gray sky above her regarded ominous, and as she spoke, rain started to fall.

During his time in workplace, Mr. Biden has solid the longer term as a stark battle between democratic and autocratic forces. But in apply, he has been more nuanced.

Like Mr. Trump, he has embraced a working diplomatic relationship with Saudi Arabia regardless of his complaints concerning the nation’s strategy to human rights, and he has imposed robust restrictions on asylum seekers who cross the border the United States shares with Mexico.

Still, his administration has labored to reposition the United States as a extra collaborative associate than it was beneath Mr. Trump, who pulled out of a number of worldwide accords and at one level threatened to tug the United States from NATO. For her half, Dr. Biden’s function has been to advertise her husband, if not the small print of his insurance policies.

“She brings a polish and a warmth and a compassion to the job unrivaled by any first lady I know of, particularly as it relates to Europe,” Mark Gitenstein, a longtime Biden ally and the ambassador to the European Union, mentioned in an interview. Mr. Gitenstein, who has recognized the primary girl for the reason that Seventies, mentioned Dr. Biden has developed from a reluctant public determine to a primary girl desperate to validate her husband’s credentials.

Mr. Biden has low approval rankings domestically, however current polling has discovered assist for his strategy internationally: Views of the president and of U.S. management have remained steady or improved since Mr. Biden was elected, in accordance with a survey of 23 international locations published in June by the Pew Research Center.

The Biden administration has rejoined a number of world organizations and pacts that Mr. Trump pulled out of, together with the World Health Organization, the Paris climate agreement, the United Nations Human Rights Council and UNESCO. Audrey Azoulay, the director normal of UNESCO, instructed Dr. Biden in a gathering on Tuesday that “it’s important to see the U.S. back at the table.”

UNESCO, or the United Nations Educational, Scientific and Cultural Organization, is finest recognized for designating World Heritage sites, greater than 1,150 of them since 1972. They embrace Yosemite National Park in California, Angkor in Cambodia and the Stone Town of Zanzibar. The group additionally retains an “intangible cultural heritage” listing of humanity’s most worthy creations — like the French baguette.

The United States had additionally withdrawn from the agency in 1984, in the course of the Cold War, as a result of the Reagan administration deemed it too prone to Moscow’s affect and overly important of Israel. President George W. Bush pledged in 2002 to rejoin the organization partly to point out his willingness for worldwide cooperation within the lead-up to the Iraq conflict. Citing bias towards Israel, the Trump administration once more pulled out in 2017.

During her journey to Paris, Dr. Biden and her daughter, Ashley Biden, toured the Élysée Palace because the visitors of Brigitte Macron, the French first girl. Mrs. Macron is predicted to affix Dr. Biden on a tour of northern France on Wednesday, in accordance with Dr. Biden’s employees. The first girl is scheduled to go to Mont-Saint-Michel, a UNESCO World Heritage web site and a Gothic-style Benedictine abbey on an island off the coast. Dr. Biden can be scheduled to go to the Brittany American Cemetery to honor troopers who had been killed throughout World War II.

This 12 months Dr. Biden has additionally traveled to Mexico, Kenya, Namibia, Canada, Japan, Jordan, Egypt and Morocco. Sometimes, she is alongside her husband for diplomatic summits, as she was in Mexico, Canada and Japan. But as a rule, she has been the particular person he chooses to symbolize him: In May, she traveled to Britain to attend the coronation of King Charles III.

In Paris, she spoke, as she typically does, of her lengthy profession as an educator, and of the significance of lifting up ladies and ladies, although Dr. Biden’s coverage portfolio doesn’t embrace formidable plans for schooling entry or elevating gender points.

“Pursuing legislation or pushing a legacy-defining initiative is not the kind of activist role of first lady she wants to play,” mentioned Michael LaRosa, her former press secretary. “In many ways, she’s much more comfortable as a permanent campaign spouse because the objective of every speech, event or trip, whether it’s political or official, is in service of her husband’s agenda and lifting up his achievements.”

Some of her journeys have been on the behest of overseas leaders.

At the Group of seven summit in Cornwall, England, in 2021, Prime Minister Yoshihide Suga of Japan and his spouse approached her as she was climbing out of a motorcade and appealed to her to attend the Olympic Games in the course of the pandemic, in accordance with Mr. LaRosa.

Masked, she cheered on the athletes from the bleachers.

When she is on a aircraft, she and her aides work on speeches, look over her news protection and speak over glasses of wine. Dr. Biden additionally takes cat naps, in accordance with Vanessa Valdivia, her press secretary.

Aurelien Breeden contributed reporting.