You must have missed his speech in Arizona during the campaign when he talked at length on immigration. He said that anyone in the United States illegally was subject to deportation.
When he mentioned the wall in every speech as his signature issue and mocked everyone who said he was not serious, then it is quite necessary for him to stick with the wall.
If the present immigration laws on the books were rigorously enforced, there would be mass self-deportation of illegals.
Trump is sticking with the wall, didn’t you read his tweet this morning?