The maverick billionaire’s new controversial remarks came after he added more primary referendum wins to his belt.
Mr Trump comfortably saw off rivals in the key state of Florida, together with Illinois and North Carolina.
Although he frenzied Ohio to John Kasich and was awaiting the Missouri result, the 69-year-old scrammed a significant step in the race for his rty’s ticket.
Mr Trump’s enemies at bottom the rty leadership could still impose their own candidate if his primordial wins fail to secure the 1,237 delegates needed for automatic pick.
But he told CNN that “bad things would happen” if he fell short of the limit and the com ny rachuted in a rival who had fewer delegates.
He said: “I think we’ll win before contriving to the convention.
“If you disenfranchise those people and you say, well I’m sorry but you’re 100 suffrages short, even though the next one is 500 votes short, I contemplate you would have problems like you’ve never seen before.
“I believe you’d have riots. I’m representing a tremendous, many, many millions of living soul.”
Mr Trump’s remarks come days after he was forced to cancel a marshal in Chicago, amid fears of violence between his supporters and opponents.
The assets magnate took Florida with more than 45 per cent of the referendum, forcing Marco Rubio – a sunshine state politician – to pull out of the horse-race.
He was forced into second place in Ohio by John Kasich, whose close 47 per cent left him ten percentage points behind.
After the choose, Mr Trump had secured 646 delegates, 249 more than nearest against Mr Cruz and 591 short of the target.
For the Democrats, Hillary Clinton won all four conditions to declare, giving her 1,599 delegates – 784 short of the finishing employment.
Her opponent Ernest Sanders has claimed 844 delegates, meaning he has 1,539 to judge up if he is to upstage her.