New Delhi, Jan. 8 -- President Donald Trump abruptly changed his tone Wednesday about his Colombian counterpart, Gustavo Petro, saying they had exchanged a friendly phone call and he'd even invited the leader of the South American country to the White House.

"It was a Great Honor to speak with the President of Colombia, Gustavo Petro, who called to explain the situation of drugs and other disagreements that we have had," Trump posted on his social media site. "I appreciated his call and tone, and look forward to meeting him in the near future."

He wrote that the upcoming meeting would take place at the White House.

That came mere days after Trump said in the wake of the U.S. operation to oust Venezuelan President Nicolas Maduro over th...