The White House has said the US government would initially pay for the wall, to get the project off the ground, but that Mexico will eventually reimburse those funds.
The Washington Post also reported details of another heated phone call which Mr Trump held with Australian Prime Minister Malcolm Turnbull on 28 January, in which the US President described their conversation as “ridiculous”.
Both men argued over an agreement in which the US accepts refugees from Australian detention centres on Papua New Guinea, with Mr Trump losing his temper and saying: “I have had it.”
He added: “I have been making these calls all day, and this is the most unpleasant call all day.”
Mr Trump even suggested a call with Russian President Vladimir Putin had been much more “pleasant”. On Thursday, he tweeted that America’s relationship with Moscow “is at an all-time and very dangerous low”.
It comes after the White House was forced to row back on claims by Mr Trump that he received personal telephone calls praising his immigration policies and a speech he made to the Scouts.
Article Appeared @http://news.sky.com/story/donald-trump-to-mexico-stop-saying-you-wont-fund-wall-10972487