Note the light applause after he says "we must admit we've used rhetoric that is harsh... sometimes we've been too slow in condemning that language for what it is." He says the left is using immigration for pure politics, which is so far from the truth. The truth is democrats actually care about people. The GOP's constituents is business and only business. Traditionally, republicans haven't been in favor of immigration reform because business enjoys the cheap labor.
But good luck to Marco Rubio. I commend him.