Trump is planning to create a wall, this wall is a border between Mexico and the USA.
Why is Trump doing this?
The first reason is, he's trying to stop people with drugs coming from Mexico get into this country.. but, he DOESN'T know that some people might not have drugs, which may be offensive to others, Trump wouldn't like him being called a drug dealer.
How much does it cost?
Trumps wall is estimated to cost about $8 billion to as much as $70 billion, with anywhere from $150 million per year to $750 million per year in maintenance. And... he's making MEXICO pay for it. Mexico isn't creating the wall, why should they pay?
I understand that Trump is trying to get rid of drug dealers, which is a good thing, but putting a wall and saying someone is a drug dealer, is very BAD and OFFENSIVE.
This wall costs so much because Trump's wall is 1,150 miles long; 40 feet high; 10 feet deep into the ground; 1 foot wide!!! That's a LOT.
If you have any questions, just go into the comments!