Donald Trump reiterates support for physical wall on Mexico border

Republican presidential hopeful Donald Trump has restated his promise to build a physical border between the United States and Mexico, after criticism over whether he had backtracked on immigration policies.

Recent weeks have seen Trump and members of his campaign obfuscate their stance on key immigration issues which were central to his victory in the Republican primaries.

However, on Tuesday the New York tycoon reaffirmed his strong stance on the border between the countries.

Through his Twitter account, Trump hinted that he's set to deliver a speech about the issue on the campaign trail on Wednesday.

"From day one I said that I was going to build a great wall on the SOUTHERN BORDER, and much more. Stop illegal immigration. Watch Wednesday!" Trump wrote.

Some campaign backers, such as former New York mayor Rudy Giuliani and former Texas governor Rick Perry had suggested that the wall take on more of a digital element.

A spokesman for the Repubiclan candidate confirmed that this would not be the case.

Speaking on Fox, Jason Miller said that the wall would be physical.

"There's going to be a physical wall," Miller said. "There will be a physical wall on the Mexico border, and, as we know, Mexico is going to pay for it."