WASHINGTON — President Trump’s 2018 budget proposal will require states to provide paid family leave programs, a senior budget official said Thursday.

The official said the budget – set to be released Tuesday – will include a plan to provide six weeks of paid leave to new mothers, fathers and adoptive parents. A departure from Republican orthodoxy, the proposal expands on a campaign pledge to provide paid maternity leave, which Trump adopted at the urging of his daughter Ivanka.

The official requested anonymity to discuss budget details in advance.

Under the plan, states would be required to provide leave payments through existing unemployment insurance programs and would have to identify cuts or tax hikes, as needed, to cover the costs. The administration said this approach would give states flexibility and stressed that the administration would provide support to state governments to help them determine how to fund the program. States could opt out if they created a different paid leave system.

Still, the approach would put the burden of funding the program on the states. It also could mean that the benefits could vary greatly by location. Democrats have proposed more expansive programs with different funding streams. During the campaign, Democrat Hillary Clinton pitched 12 weeks of family leave, paid for by taxes on the wealthy.