Donald Trump spoke about the infamous Mexico wall, he said, his proposed border wall may not need to cover the whole US frontier with Mexico because of existing natural barriers.
Building the wall, and having it paid for by Mexico, was one of Mr Trump’s key campaign promises.
The US President said natural barriers such as rivers and mountains meant a man-made structure along the entire length of the border was not necessary.
He also said that some areas were so remote that a wall would not be needed.
He also said it was important that border agents and others should be able to see through the wall so they could be aware of oncoming dangers, suggesting whatever structure ends up being built would likely be closer to a slatted fence than a solid wall.
Mr Trump said it was vital the new construction was transparent to protect border guards from drug traffickers.
In his proposed budget unveiled in March, Mr Trump allocated $1.4bn for wall construction in the ongoing fiscal year, with another $2.6bn for the 2018 budget year starting on 1 October.
However, Congress did not approve any funding for wall construction this year – only cash for repairs to the existing fencing.