WASHINGTON — Ivanka Trump has opened the White House doors and her father’s administration to companies that participate in a worker-training initiative she’s led, even as the president adopts policies that labor unions say would weaken apprenticeships.

The president and his daughter, who is a senior adviser in the White House, celebrated the anniversary of her “Pledge to America’s Workers” program last month. More than 300 companies including Apple, Microsoft, Walmart, Salesforce.com, Lockheed Martin and Toyota Motor have agreed to train more than 12 million people, the White House said.

Participating in the program may score the companies goodwill and even face-time with a president who sometimes considers policies that would hurt them. For example, Trump has threatened to slap tariffs against cars Toyota imports to the U.S. and on iPhones imported from China, and he’s criticized the price of weapons Lockheed makes for the military, its most important customer.

For the companies, participation is low-risk. Much of the training would have been done in the absence of Ivanka Trump’s initiative, some companies say, and the program sets few standards for employers to meet and carries no repercussions if they fall short. After signing pledges, participating companies have received visits from Ivanka Trump, Vice President Mike Pence and members of the president’s Cabinet.

The initiative has no federal funding. Trump said he considers employee training the responsibility of the private sector. The Department of Labor recently proposed a regulation that would allow employers to set their own standards for apprenticeship programs, a proposal the administration says would expand such opportunities for workers.

The AFL-CIO said the new rules “could decimate training and labor standards in registered apprenticeship programs across the country.” The proposal would “give employers license to implement whatever low-road standards they see fit,” said Carolyn Bobb, an AFL_CIO spokeswoman.