The President can pardon them for the crime of entering the country illegally, but that will not make them legal.
PS. The word “Dreamers” should never pass Donald Trump’s lips.
He should ban all euphemisms with regard to illegal immigration.
One of the powers of the Presidency is so set the tone by controlling the terms people use to discuss things. Every time Trump says “Illegal Alien” the Donks.will freak out and tie themselves in knots, screaming about how he has to call them “unregistered Americans” or some such. This will make his opposition completely ineffective.
Within six months, they will get tired of this and go back to calling them what they are. Once they start doing that, he will be halfway to winning.
No use of the term “progressive “ either.
Call these Marxist scumbags what they are, socialist and communists.