Priorities USA Action, the lead super PAC backing Clinton, is working with Emily’s List to raise more than $20 million to reach women in battleground states through paid advertising and other voter outreach, The Washington Post has learned. The involvement of Emily’s List will be conducted through Madam President, a project of its independent expenditure arm.

The campaign will seek to drive up turnout among female voters — particularly young ones — with a message that the Republican presidential candidates would block access to health care for women and oppose fair pay. 2016 marks the first presidential contest in which the number of millennials eligible to vote will match the number of eligible voters from the baby boomer generation.

“Women voters are the key to winning the 2016 elections, for Hillary Clinton and for Democrats up and down the ballot,” Stephanie Schriock, president of Emily’s List, said in a statement. “We are thrilled to be joining forces with Priorities to make sure every woman in this country understands that with a Republican in the White House, our rights, freedoms and opportunities will be on the chopping block.”