Well, the OP has mischaracterized the Democrats' position as " wanting to legalize everybody". The initial, proposed, unamended bill doesn't apply to anyone who arrived in the US after 12/31/11 or to anyone with a criminal record. What the final bill will look like after the Senate has chopped it up, the House has done its thing, and there is a compromise bill agreed to (or not) is anyone's guess. Overall, just as the OP says, what we end up with (if anything) will be something in the middle; that is the nature of the legislative process.