Republican presidential candidate Donald Trump refused to take responsibility on Sunday for clashes that have erupted at his campaign events, saying he was not inciting violence but giving voice to the anger of his supporters.
The real estate tycoon used a round of television appearances to beat back furious criticism from Republican rivals and Democrats alike that he was encouraging discord with divisive language disparaging Muslims and immigrants.
"I don't accept responsibility. I do not condone violence in any shape," Trump said on NBC's "Meet the Press."
The tension at his rallies, Trump said, came from people being "sick and tired" of American leadership that has cost them jobs through international trade deals, failed to defeat Islamic State terrorism and treats military veterans poorly.
"The people are angry at that—they're not angry about something I'm saying. I'm just the messenger," Trump said.
Trump, front-runner for the Republican nomination, appeared unchastened after simmering tensions between his supporters and protesters angry over his positions on immigration and Muslims erupted on Friday night, forcing him to cancel a Chicago rally and casting a shadow over his campaign appearances on Saturday.
The disturbances erupted days before the next five presidential nominating contests on Tuesday, which could cement the New York billionaire's lead over Republican rivals US Senators Ted Cruz and Marco Rubio and Ohio Governor John Kasich.
The scenes in Chicago followed several weeks of violence at Trump rallies, in which protesters and journalists have been punched, tackled and hustled out of venues, raising concerns about security heading into the November 8 presidential election to replace Democratic President Barack Obama.
Trump's rivals for the Republican nomination, as well as Democratic candidates Hillary Clinton and Bernie Sanders, heaped criticism on the New York billionaire after Friday's clashes.
Kasich said Trump had created a "toxic environment." On Sunday he stressed that he was hearing Trump supporters' concerns about job stability, wages and the future and that he was the candidate who could "fix things".
"I'm not interested in what he says. I'm interested in appealing to his voters," Kasich said on ABC's "This Week."
"Those are the people that need to hear me."
Trump, who has rallies scheduled on Sunday in Illinois, Ohio and Florida, hopes to beat both Kasich and Rubio, the US senator from Florida, in their home states on Tuesday.
A new Wall Street Journal/NBC News/Marist poll showed Trump leading Rubio 43 per cent to 22 per cent among likely primary voters in Florida. Trump lags Ohio's popular governor in that state, 33 per cent to Kasich's 39 per cent, the poll showed. The survey had a margin of error of 2.2 percentage points.
Both states award all their delegates to the winner.
Blame the protesters
Sarah Palin, the vice presidential candidate in Republican John McCain's failed 2008 campaign against Obama, planned to attend a Trump rally in Florida on Sunday. Eight years ago, Palin and McCain drew criticism for overheated campaign rallies marked by crowds openly hostile to Obama, who became the first African American president.
Trump has harnessed the discontent of white, working class voters angry over international trade deals that cost them jobs. He has proposed building a wall along the southern US border, disparaged some Mexican immigrants as criminals and advocated a temporary ban on Muslims entering the country.
On Sunday, he turned the criticism of his rallies against the protesters he called professional "disrupters" sent by Sanders, the US senator from Vermont.