And there was a strange scene, all of us watched last night and today. A reminder of the movie "mr. Smith" and that exhausting filibuster. This event, however, had half a million people signing onto... See More
And there was a strange scene, all of us watched last night and today. A reminder of the movie "mr. Smith" and that exhausting filibuster. This event, however, had half a million people signing onto #standwithwendy, as texas lawmaker wendy davis spent 13 straight hours talking, trying to create a barricade against a law she didn't want. Abc's dan harris has the story. Reporter: When state senator wendy davis stepped to the podium in her pink sneakers she knew she was in for a long day. Member, I'm rising on the floor the today to humbly give voice to thousands of texans who have been ignored. Reporter: The rules of a texas filibuster are unforgiving -- no food, water, or bathroom breaks. No sitting, no leaning. My lower back started hurting really, really badly. Reporter: She was motivated though. She was fighting a republican bill that critics say would effectively close nearly all of the abortion clinics in texas. Seven hours in, a colleague had helped her put on a back brace. There was a point where I was afraid that physically something would happen that was outside my control. Reporter: Fans latching onto her compelling biography. Davis became a single mom at age 19 and put herself through harvard law school. After 11 hours, she veered off-topic and her fellow senators voted to end her filibuster. Her supporters in the gallery erupted. There was so much commotion that republicans were unable to pass the bill on time. We're trying to protect innocent human life. Reporter: This is probably only a temporary victory. Republicans will likely reintroduce and pass the bill. The senator knows this, but would she do it again? In a heartbeat. Reporter: Dan harris, abc news, new york.
This transcript has been automatically generated and may not be 100% accurate.