Santiago Tobar Potes was brought to the United States by his parents from Colombia undocumented at age 4 and is now a student at Columbia University in New York. Follow him on Twitter: @stobarpotes. The opinions expressed in this commentary are his own.

(CNN)I am one of an estimated 750,000 Dreamers, undocumented immigrants brought to the United States as children, now facing possible deportation by President Donald Trump. I worry that the President -- whose grandfather, mother and wife all immigrated to America -- will turn my dream into a nightmare and throw me out of the land where I grew up.

A few weeks ago I felt like I was dreaming when I was at a White House event and met first lady Michelle Obama. I had just been appointed to the student advisory board for her Better Make Room initiative, which encourages young people to go to college. I am inspired by Better Make Room and want to help more young people improve their lives through higher education.
But as I watched President Trump being inaugurated, I found it hard to believe he might make it impossible for me to go to college in this country.
For the time being, I am here legally under the Deferred Action for Childhood Arrivals, or DACA, program created by President Obama through an executive order in 2012. But how long that will last is anyone's guess............................

http://www.cnn.com/2017/02/08/opinio...potes-opinion/