"Well, you know, I've studied assassinations," Trump said. "And I must tell you the most impactful people, the people that do the most -- you take a look at Abraham Lincoln... the people that make the biggest impact, they're the ones that they go after."

A Sri Lanka Customs spokesman said the group, returning home after a four-day holiday in the Thai capital, had Kush, a potent, plant-based strain of cannabis, hidden in their luggage.