She made her intentions known in a biographical video, narrated in part with archival footage from her late father, Jerry Russell.

“I’m running for Congress because people’s voices are still being silenced,” she said. “I’m running for our children and grandchildren, so they can live and love and fight for change themselves.”

The potential Davis-Roy matchup is likely to be among the most polarizing races the state has seen in recent years. Davis is a fierce national advocate for abortion rights, while Roy has built his reputation in his first six months in Congress as a conservative firebrand.

Davis lives in Austin but spent much of her adult life in Fort Worth, where she served on the City Council and in the state Senate. In 2013, Davis became a national figure when she filibustered an omnibus anti-abortion bill.