Mrs. Trump's launch of her platform came as her husband faces questions over $130,000 in hush money paid by one of his attorneys to a porn actress who says she had sex with Trump in 2006. Trump has acknowledged reimbursing his lawyer for the payment to Stormy Daniels, but denies her allegations. Separately, a former Playboy model has revived her allegations of a 10-month affair with Trump in 2006. Trump also denies the allegations from Karen McDougal.

Such reports have kept the first lady's relationship with her husband under intense scrutiny, and Mrs. Trump has, at times, has been noticeably absent from her husband's side. But both made a point of displaying affection during the Rose Garden event.

A brief video that played before the first lady appeared recapped some of her public appearances with children. Several Cabinet members attended, including Treasury Secretary Steven Mnuchin and Transportation Secretary Elaine Chao, along with Vice President Mike Pence and his wife, Karen. The first lady's mother, Amalija Knavs, was also in the audience.

During nearly 16 months as first lady, Mrs. Trump has demonstrated her interest in children. She visited young hospital patients in the U.S. and during overseas trips with the president, often reading to them and encouraging them to do their best.

Her interest in the opioid drug crisis has taken her to care centers and hospitals in West Virginia and Ohio to learn about the epidemic's effect on babies born to mothers addicted to the powerful painkillers. She convened a White House roundtable on the issue last fall.

The first lady invited representatives of major online and social media companies to the White House in March to discuss internet safety, a meeting that came more than a year after she promised to use her White House platform to discourage cyberbullying. Her choice was ridiculed almost immediately, given her husband's habit of name-calling on Twitter, but Mrs. Trump said at the meeting that she wouldn't be discouraged from doing what she thinks is right.