“This is a senator who was one of only 22 Republican men voting against the Violence Against Women Act,” said Stephanie Schriock, the group’s president, in an interview previewing the effort with TIME. “He has worked tirelessly to roll back women’s freedom.” Central to the EMILY’s list argument is Rubio’s vocal support for an upcoming Republican Senate bill to ban abortions after 20 weeks of gestation. The bill, which has not yet been brought for a vote, faces certain defeat in the Democrat-controlled Senate. “I’m very supportive of it. I’m already on a bill that does it in the D.C. area,” Rubio told POLITICO this week. “We’re trying to determine appropriate language that our colleagues can coalesce around, so that’s what we’re working on.”…

EMILY’s List and the Democratic Senatorial Campaign Committee have compiled long lists of Rubio’s alleged sins against women, ready to deploy against him in a presidential campaign. These include his votes against pay equity legislation and for mandatory ultrasounds before abortions in Florida. Rubio has explained his opposition to the Violence Against Women Act vote by explaining the bill diverted funding for state domestic violence prevention. He called the Lilly Ledbetter Fair Pay Act, which passed in 2009, a gift for trial lawyers.

“We think it’s really important that the American people know his entire background,” Schriock said. “We’re going to track what Marco Rubio does to appease his conservative base and make sure the rest of the country knows where he stands on these issues.”