Marco Rubio, who has been running third and fourth in the Republican presidential race, told Fox News Saturday that the rowdiness of Donald Trump campaign events should cost Trump support.
"You can't ignore that violence is increasing at Donald Trump events," Rubio said. He pointed to the incident in North Carolina where a Trump supporter punched a black protester.
"Is this what the party is going to be about?" Rubio asked. "If it is, we are in a lot of trouble."
Being a leader means acknowledging people's anger, but trying to address why they're angry, not manipulating their anger.-- Marco Rubio (@marcorubio) March 12, 2016
He said it was becoming increasingly tougher for him to keep his pledge to support Trump if he wins the GOP presidential nomination.