Without mentioning Donald Trump by name, President Obama on Thursday once again tweaked the GOP presidential hopeful and businessman on immigration policy.

At a reception for the 25th anniversary of the White House Initiative on Educational Excellence for Hispanics, Obama said that "we made this country great. not by building walls but by tearing them down...not by trying to divide us but by trying to build community, not by telling people to go back where they came from because this would be a really empty country if that's what happened."

Trump has advocated building a large wall all the way across the U.S.-Mexican border to stop illegal immigrants from coming into the United States, and he has said that if elected he would tell the illegal immigrants already in the United States to return to their home countries.

Obama, who has referred to Trump as a "carnival barker," has appeared to take other subtle swipes at the billionaire over the past few weeks, including an apparent jab over his "Make America Great Again" campaign slogan.

The White House Initiative on Educational Excellence for Hispanics was originally established by President George H.W. Bush in 1990 to boost school attendance and graduation rates for Hispanics.