Donald Trump called the situation in Venezuela a 'disgrace to humanity' & said that the deadly crisis was possibly the worst of its kind in 'decades.'

US president Donald Trump has called the situation in Venezuela a "disgrace to humanity" and said that the deadly political crisis was possibly the worst of its kind in "decades."

"We haven't really seen a problem like that... in decades, in terms of the kind of violence that we're witnessing," Trump told a joint press conference on Thursday, with visiting Colombian president Juan Manuel Santos.

"People don't have enough to eat. People have no food. There's great violence. And we will do whatever is necessary and we will work together to do whatever is necessary to help with fixing that... What is happening is really a disgrace to humanity."

Trump's comments came a day after the Venezuelan government announced it was sending more than 2,500 troops to a trouble-hit region on the border with Colombia to try to quell weeks of violence that claimed 43 lives in Venezuela.

Despite its vast oil reserves, Venezuela is suffering chronic shortages of food, medicine and other basic supplies, something the center-right Opposition blames on mismanagement and corruption in the Socialist government.

President Nicolas Maduro, in turn, blames sabotage by the "bourgeois" opposition, which he says is backed by Washington.

"When you look at the oil reserves that they have, when you look at the potential wealth that Venezuela has, you sort of have to wonder why is that happening, how is that possible?" said Trump.

"It has been unbelievably poorly run for a long period of time, and hopefully that will change and they could use those assets for the good, and to take care of their people," he said.