Sen. Marco Rubio on Wednesday endured more than an hourlong gun control debate in Florida in which he won some applause, but was mostly booed and rejected by the crowd, and then later mocked by some in the media on Twitter for being out-debated by teenagers.

CNN’s televised town hall meeting on guns was held a week after a 19-year-old walked into Marjory Stoneman Douglas High School and killed 17 people with an AR-15 style weapon.