Editor's note: Florida Rep. Debbie Wasserman Schultz is chairwoman of the Democratic National Committee. (CNN) -- Last week, I had the honor to visit the Fast for Families tent on the national mall. The fasters welcomed me with open arms and a smile despite their struggle. The tent was full of messages of encouragement, expressions of admiration and symbols that remind every visitor of the reason for the fasters' sacrifice: the rights of immigrants and a House vote on the Senate immigration bill. Volunteers explained the meaning behind each symbol: a shoe they found abandoned in the desert represents the...