The claim:

“But they should have pushed it faster. They should have pushed it harder. And they didn't, they didn't. If they would have, it would have been a little bit better.”

The facts:

Trump blames congressional leaders for his own mistake. His fiscal 2019 budget only called for $1.6 billion for barrier construction. Congress agreed to that amount and then lawmakers were shocked when Trump rejected it, saying it was far less than he wanted. That led to the lengthy government shutdown.

The claim:
“You know what happened on the West Side Highway. That young wise guy drove over and killed eight people and horribly injured — nobody talks about that — horribly, like loss of legs and arms. Going 60 miles an hour, he made a right turn into a park on the West Side Highway along the Hudson River in New York. He had many people brought in because he was in the United States. It's called chain migration.”

The facts:

Trump frequently says terror suspect Sayfullo Habibullaevic Saipov brought 22 relatives into the United States through “chain migration” or the diversity visa lottery. But no agency has confirmed this figure and experts say it is implausible because Saipov only had a green card, meaning he could only bring in his wife (already in the United States) or his minor children (already U.S. citizens). Trump has now said this false claim 19 times, meaning the next mention will earn it a spot on our list of Bottomless Pinocchios.

https://www.washingtonpost.com/politics/2019/02/15/fact-checking-trumps-announcement-national-emergency/?utm_term=.ad3255f8495f