New Delhi, Jan. 26 -- As US President Donald Trump took a victory lap in Nevada, he roasted his predecessor, Joe Biden, and said he made world leaders wait months to speak with him over the phone.

"They didn't even know we had a president," Trump said.

He was in Nevada at an event intended as a victory lap in a critical swing state that he won on his way to a second term.

In a viral clip circulating on social media, a relaxed Trump laughed and joked his way through a modified version of his pre-election stump speech. It included repeated bashing Joe Biden as he also took potshots at other world leaders.

"Since I became the 47th president at noon on Monday, I've been moving with urgency and historic speed to fix every single calamity o...