The card consisted of twelve matches, including two on the pre-show. In the main event, Dolph Ziggler retained the Intercontinental Championship by defeating Seth Rollins 5 -- 4 in an Iron Man match that went into sudden death overtime. This was the first time that an Intercontinental Championship match was the main event of a WWE pay-per-view since Backlash in 2001. In the penultimate match, AJ Styles retained the WWE Championship against Rusev. On the undercard, Alexa Bliss retained the Raw Women's Championship against Nia Jax in an Extreme Rules match, Bobby Lashley defeated Roman Reigns, and Shinsuke Nakamura defeated Jeff Hardy for the United States Championship.

Answer this question based on the passage: who won the raw women's championship at extreme rules? OK. Let's think. My stream of consciousness:
The relevant information is: On the undercard, Alexa Bliss retained the Raw Women's Championship against Nia Jax in an Extreme Rules match, Bobby Lashley defeated Roman Reigns, and Shinsuke Nakamura defeated Jeff Hardy for the United States Championship. The answer is Alexa Bliss.