I was watching Warren and Castro today. Warren just kind of kept on truckin’ — she continued to charm with stories of her middle-class background (including a formative chapter of her life spent here in Houston) and continued to emphasize her campaign thesis that the system is rigged toward moneyed interests. She did not take the opportunity to attack, say, Biden, which would’ve been a risk IMO. So I think her standing in the race will stay about the same.
Castro presents a much more interesting case. He was the designated Biden attack dog tonight, calling the former vice president out for taking credit for Obama’s accomplishments but avoiding blame for his failings. Most controversially, he pretty nakedly attacked Biden’s age when he asked Biden if he was being forgetful. Maybe that will tap into a vein of anti-Biden sentiment in the party. Maybe it will turn people off as too vicious. Either way, I think he’s the likeliest candidate to see polling movement after tonight.