Beto O'Rourke took his fight directly to Texas Gov. Greg Abbott, telling him during a press conference on the Uvalde school shooting, "This is on you!"
The committees will study how mental health, social media and other issues intersect with mass violence, according to the governor's office.
"Shame on you, Abbott!" a crowd member yelled as Abbott arrived with the Bidens at the school where 19 children and two teachers were killed.
Abbott said he was "livid" about being given incorrect information on the school shooting, but stopped short of offering an apology for repeating it.
The governor will hold a news conference in Uvalde, Texas, on Friday instead of visiting the gun group's national conference.
The governor said he made a campaign appearance after learning of the Uvalde school massacre so his supporters would "know what happened."
While mass shootings multiplied, the Texas governor liberalized firearm access.
GOP Gov. Greg Abbott said what Texans need "now more than ever is our love" after a gunman killed 19 children and two teachers in Uvalde.
"You're all doing nothing," O'Rourke said to Texas officials who were giving updates on the mass shooting at an Uvalde elementary school.
At least 19 children died in a shooting at an elementary school in Uvalde, Texas.