You're behind the curve. Do some research. Actual bollard walls have replaced old barriers and new ones are being built every day. March included many new contracts for NEW wall construction in priority areas.
I've also read that the latest gathering caravans heading towards Mexico's southern border are slowing down and decreasing in size due to Pres. Trump's threat of cutting of remittances to Mexico.
There's only so much he can do from the Executive Branch without realistic funding from the Socialist House of Representatives. So far, he had done more than any other President on this issue since I have been involved during 80's (living 2 miles from Tijuana).
miles please?