John McGraw, 78, was charged with assault after he was filmed punching a protester.
Donald Trump is considering paying legal bills for the supporter accused of sucker punching a protester at one of his rallies last week.
"I’ve actually instructed my people to look into it," Trump told host Chuck Todd on NBC's "Meet the Press."
Read: Shocking Moment Secret Service Surround Trump as Man Rushes Ohio Rally Stage
John McGraw, 78, was charged with assault after he was filmed punching a protester who was being led from the event in Fayetteville, North Carolina.
INSIDE EDITION later caught up with McGraw who suggested that the protester, identified as Rakeem Jones, could be from ISIS, adding: "Next time, we might have to kill him."
On Sunday, Todd asked Trump whether he accepted responsibility for the incident because of his comments about using violence against protesters. In his response, Trump appeared to defend McGraw's actions by putting blame on the supporter.
"I don't accept responsibility," Trump said. "I do not condone violence in any shape. And I will tell you from what I saw, the young man stuck his finger up in the air, and the other man sort of just had it."
Over the weekend, as more protests broke out, police used pepper spray to control the crowd in Kansas City - but Trump has refused to take any blame.
Instead, Trump claimed the aggression was triggered by Bernie Sanders' supporters.
"Get your people in line Bernie!" he said during a rally in Ohio.
But Sanders hit back, calling Trump a "pathological liar."
Read: Donald Trump Blames Rally Unrest on Sanders: 'Be Careful, Bernie!'
Other candidates have also hit out at Trump, with Hillary Clinton accusing him of "trafficking in hate and fear." New York City Mayor Bill de Blasio also came down hard on him over the weekend, calling him a racist.
"It's a clear pattern of using racism as a tool," he said. "Using racism for political gain."
The escalating tension comes at a crucial moment in the race for the White House, with key primaries tomorrow in Ohio and Florida. If Trump wins, the GOP nomination is effectively his.
A total of five states will hold Republican and Democratic primaries on Tuesday: Florida, Ohio, Illinois, Missouri and North Carolina.
Watch: Trump Supporter Who Punched Protester: Next Time, We Might Have to Kill Him
