Donald Trump's campaign rhetoric a political arson: Hillary Clinton

WASHINGTON: Democratic presidential front-runner Hillary Clinton today accused Donald Trump of running an "ugly" and divisive rhetoric campaign, which she said is a "political arson".

Clinton called the heated protests last night at the Republican front-runner's rally in Chicago "deeply disturbing."

"The ugly, divisive rhetoric we are hearing from Donald Trump and the encouragement of violence and aggression is wrong, and it's dangerous," Clinton told her supporters in St Louis, Missouri at a campaign rally.

"If you play with matches, you're going to start a fire you can't control. That's not leadership. That's political arson," Clinton alleged.

She was speaking to about 100 campaign volunteer, local media reported.

Trump was forced to cancel his campaign rally in Chicago after hundreds of people gathered at the arena to protest against his 'politics of hatred' and scuffled with his supporters in the largest-ever demonstration against the Republican presidential frontrunner.